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Mugen battery - a dud.

First of all let me say that I don't know if this is a one off - or what the customer service is going to be like.
However, I thought that I would flag this up straightaway because I know that lots of people seem to be talking about ordering these very expensive batteries as an answer to DHD short battery life problems.
I waited for about 3 weeks for delivery of this 1500ma battery which I ordered directly from the Mugen site.
It arrived today but it is clear that it is faulty. It won't hold its charge. It has been on mains charge with phone switched off for about 8 hours and now the widget tell me that it is only about 25% charged and going down pretty fast.
I've emailed Mugen and I'll let people know how they respond

Woke up this morning to find an email from Mugen telling me that they will send me anolther one.
No word on whether I had to return the dud. I emailed them to ask them.
Anyway, so far so good.
Quick response. Hope that I don't have to wait for the replacement as long as I did for the first one.
The dud battery doesn't do anything now. No charging lights - nothing. Completely dead.

Just had an email asking me to send back the original. A bit of a nuisance. I kow that it is entirely correct that he should be sent back the original but for these prices the batteries shoujld be tested, the transaction should be straightforward and a pleasure.
So far, it is all frustrating and a nuisance
Nothing has been said about refunding me the cost of the battery to HK.

Thanks for informing us. I was wary about ordering one of these. Please let us know if the replacement is better.

Well, **** happens in mass manufacturing - but it's good to see they are responsive.
I'd say the minimum expectation is that it performs the same as the stock battery, so it'll be interesting to see how the new one is.

well I would hope that you would perform better than a stock battery. It is very expensive – and about $46 and I had to wait nearly 4 weeks for its delivery, and then I had to ask for another one and I'm still waiting.
I managed to buy replacement stock batteries for less than $20.

and also, I don't know if I'm going to get back the cost of returning the dud.

I can't see any 1500mAh batteries for HTC Desire HD on the mugen website, do you mean their 1300mAh battery?

No. 1500
*******

Hello all,
A link for 1500 ?

Great news. I've received the replacement battery.
No word about reimbursing me for the postage costs for sending the dud back though. However, it wasn't that much and if this one works well, I'll be happy.
It is on charge and seems to be charging up well. I have no instruments to measure it so I will simply have to let people know my impressions as it goes along.
It is a 1500

I have one also. Definitely a 1500. My current full charge status is at 88% after 5 hours, and the screen has been on for 2 hours. It's had its cycle of at least 5 full charges (recommended by Mugen), and the last time I put it on the charger was at 15% after 36 hours, and just under 5 hours of screen on time. My screen brightness is not really low either. I have it set at 60%. I'm very happy with it.
http://forum.xda-developers.com/showpost.php?p=12085610&postcount=269

could you please provide a link?

So far this battery looks very promising. It hasn't been through several cycles yet but it already seems to me to last longer than the stock battery - which had been recycled at least 40 times

lejars1 said:
well I would hope that you would perform better than a stock battery. It is very expensive – and about $46 and I had to wait nearly 4 weeks for its delivery, and then I had to ask for another one and I'm still waiting.
I managed to buy replacement stock batteries for less than $20.
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Can you send me a current widget log of a full charge cycle once you condition the battery? I've calculated the OEM battery capacity of a 6 months old battery and it's 1121 mAh. That is the usable battery capacity (who cares if there is still some charge in the battery if the phone can't use it?) so it would be interesting to see if Mugen made anything better.

Looking forward to hear some news
Sent from my Desire HD using Tapatalk

tkolev said:
Can you send me a current widget log of a full charge cycle once you condition the battery? I've calculated the OEM battery capacity of a 6 months old battery and it's 1121 mAh. That is the usable battery capacity (who cares if there is still some charge in the battery if the phone can't use it?) so it would be interesting to see if Mugen made anything better.
Click to expand...
Click to collapse
Any news on this? I'm also curious to know. Thanks

Sounds promising. Strange that they pulled it from their site and someone else mentioned they are releasing this mid-April now.

Hi Guys.
I just wanted to show that in the past I've had very good dealings with Mugen Power Batteries.
You can read this post from a couple of years ago. The phone and forum were different. The Sales person after I asked him via email - even promised me a spare replacement cover, (so 2 new covers) one which arrived separately some time later.
Nothing but a great experience for me as a company and they clearly step up to the plate.

link
possible to get a link for the 1500? I find only the 1300 on the mugen website

Anyone bough both the Anker and Chichi batteries for their Sensation?

I don't know which one to get, so based on your experiences, were they worth it?
Has anyone bought both and gotten better performance on one more than the other? Has anyone gotten either of these and actually have had equal or less battery life compared to the stock battery?
thanks for any helpful replies!

I'm wondering about this too. Judging from threads from both brands, alot of people are getting the anker as they are cheaper. But according to some users who have used chichi are saying they last long and have had great experiences with them despite being $20+. Any one else can chime in?
Sent from my MB860 using XDA Premium App

Yeahh. I had a chichi battery for my G2 and it worked wonders so Im leaning more towards it.
Sent from my HTC Sensation 4G using XDA App

I bought both...figure I could use one for a back up if anything but both seem to be getting good reviews..the CHI is on the 2nd cycle, i got 10 1/2 1st one under heavy usage would only get about 8 hr at most under heavy with the stock.
2nd cycle i was at 14 hrs under semi heavy usage, before I feel asleep when I woke up it was dead so not sure how long it actually lasted.
3rd cycle starting today..
The Anker is in the mail so hopefully it will arrive soonL
Having both I would prob go with the Anker since its cheaper and the reviews have been very good as well, I purchased the ChiChi when the Anker was 60 now that its back to $10 I would just go with those
Either way I'll post a comparison when I get both although I don't think there will be a huge noticeable difference, seems like both are excellent batteries

I just won two chichi batteries + charger for $15 at Ebay. what a good deal.
will test once i receive them.

jawang26 said:
Either way I'll post a comparison when I get both although I don't think there will be a huge noticeable difference, seems like both are excellent batteries
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I feel like there won't be much difference either, but I'd still absolutely love it if you could give some side-by-side specs.
Also, one nagging question from the Anker thread, if you have access to a scale, would you be able to compare weights between the stock, Chichitech, and Anker?

subed, also want to find out what the life difference between the 2. But i don't think you can go wrong with either one right? because they both will last longer than the htc one...

Will weigh both ,I have a scale...just not sure if I can find it, didnt come in the mail today hopefully tomorrow or mon which will let me fully cycle the ChiChi ones

My chichitec lasted 25 hours first charge with moderate usage. Not heavy, but definitely not light usage. Moderate till about 6pm then heavy till around 11pm. Then it was in standby the rest of the night. The stock battery would have never come close. I ordered an Anker too since it was only 9.50. Waiting on that and my battery charger dock still. Got the battery and used the phone for a few hours without charging it. Started at 70 got down to around 30. Then I turned my phone off and charged it for about 7 hours. Got up at 6am, unplugged and turned it on. Lasted all day and all night and died around 730 the next morning.charged it for about 3 hours on my laptop at work today till it was full with it on. Going to let it drain completely again on this charge. Stoked.
Sent from my Xoom using XDA Premium App

Can anyone post a link for these batteries, tried searching didn't come up with any results thanks in advance

I have both on the way. Waiting on slow shipping heheh. I'll let you know!

Is there a need to peel off the sticker for Chichitec ?? I remember having to do this for my G2 and it had to chip lil bits of the plastic off for it to fit and not bulge out lol

BKTC said:
Is there a need to peel off the sticker for Chichitec ?? I remember having to do this for my G2 and it had to chip lil bits of the plastic off for it to fit and not bulge out lol
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There was no sticker on mine.

Anker Battery great success

http://www.amazon.com/Anker-1600mAh...9A/ref=sr_1_15?ie=UTF8&qid=1318871003&sr=8-15
Bought it and my battery life is very good now, I can actually power use my phone without worried about battery. I played fruit ninja and played music via 3g with the speakers for more than an hour and loss like 15% percent battery. Went to bed with the battery at 12% and when I woke up it was at 8%. I can't get you any technical specs but the battery is alot better than stock, and for the price you can't go wrong.

Bought these batteries but after pretty extensive testing, I've got to say that any actual difference is marginal at best. Battery Monitor Widget measures them at nearly the same capacity as the original...the best figure it gave was ~1300mAh but accounting for the % error that's likely a bit overstated. Bottom line...you get two batteries on par w/ stock for a good price...just don't expect any real performance difference between a new stock battery and an Anker.

I too purchased this set of anker batteries and charger. But picked up on ebay for even less from the same amazon dealer. Also I needed the charger to charge batteries for older phones that used a proprietory charger that I didn't have. My stock HTC battery just wasn't keeping up after only a few months old. Maybe it says something for the quality of the OEM battery. Who knows. But after 2 weeks of using one of these batteries the difference is still night and day for me. Charge lasts much longer than my 6 month old OEM battery. Whether they are better/worse than a NEW OEM battery I can't say. But for the price and after running one for 2 weeks I definitely give them 2 thumbs up.

I highly doubt these are 1600 mah, it's probably closer to the stock battery.
You guys are comparing a heavily used stock battery to these new ones. What you should be comparing is a new stock battery vs these and you'd probably end up seeing very little difference.

I agree, I bought the same batteries and I wouldnt say the power was what I expected. I wouldnt say they are worth the price, rather just practice good battery management with the proper settings over the battery.

tejasgadhia said:
I agree, I bought the same batteries and I wouldnt say the power was what I expected. I wouldnt say they are worth the price, rather just practice good battery management with the proper settings over the battery.
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That or have a charger handy at all times lol.
Sent from my HTC Inspire 4G using XDA App

Well I just got them for Christmas (gosh I love ordering my own gifts from time to time Haha) and Will give a review after I charge one up tonight and give it a few days use. I can say that I got this phone in March and battery monitor widget consistently measures actual capacity between 986 and 1081 mAh. So OEM battery durability seems to be pretty crappy. Fingers crossed for the new ones!
Also, the stock battery in the last month has still been awful with the battery management technique of "put it on the table and do something else while leaving it in idle mode with data connection off"
Sent from my Inspire 4G using XDA App

News is good! This battery tests at around 1500 mAh, as expected short of the advertised 1600, but far better than the older stock battery! After 5 hrs 5 mins on battery with fairly light use, I have 83% battery left.
Sent from my Inspire 4G using XDA App

I got one of those on the 25th too. The first couple of days were moderatly light use until I got home from work. Then it was more. Got 26+/- hours out of each charge. Lots better than stock battery that was down to 5% usually after a 10 hr day with the same amount of usage

I wonder how the performance of the battery last over time. As in does the quality compare to that of the stock? So far my stock battery has a charge of about 8 hours on a good charge with moderate use anand its about a year old. How do these compare?
Sent from my HTC Inspire 4G using XDA App

We shall know in a few weeks/months/Kardashians (you know, 72 days). We will keep you posted man! As terrible as quality was on stock, I don't see how it could get much worse. This battery peaks out aroun 27 degrees Celsius when charging during use and stock would hit 34 degrees consistently.

Have to report that my Anker batteries are still doing great. Battery monitor still reporting both around 1475. I find myself not charging the battery overnight sometimes since I still have a decent charge left. And as someone mentioned it isn't fair to compair these new batteries to a failing stock battery. Stock battery was ONLY 7 months old (not good at all). It too is made in china. You can purchase 2 anker batteries and a universal charger for half the price of an oem replacement battery. Never expected the anker batteries to be 1600. How about someone with a fairly new oem battery and using battery monitor report the mAh they get.

Agoattamer said:
Have to report that my Anker batteries are still doing great. Battery monitor still reporting both around 1475.
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May i ask how long ago you bought this battery?
---------- Post added at 04:52 AM ---------- Previous post was at 04:39 AM ----------
calc said:
I highly doubt these are 1600 mah, it's probably closer to the stock battery.
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Click to collapse
As from previous experience, It is not a big deal if they are less than 1600mah, so is the case of OEM batteries.
Or a quick Google search will show batteries with much less capacity selling for a lot more.

Agoattamer said:
Have to report that my Anker batteries are still doing great. Battery monitor still reporting both around 1475. I find myself not charging the battery overnight sometimes since I still have a decent charge left. And as someone mentioned it isn't fair to compair these new batteries to a failing stock battery. Stock battery was ONLY 7 months old (not good at all). It too is made in china. You can purchase 2 anker batteries and a universal charger for half the price of an oem replacement battery. Never expected the anker batteries to be 1600. How about someone with a fairly new oem battery and using battery monitor report the mAh they get.
Click to expand...
Click to collapse
mine is what i would consider fairly new and battery moniter reports the total mah to be 1230mAh stock OEM htc battery that came with my inspire and i get usually a day and half out of normal use

I have had my batteries for about 2 1/2 months now. Still getting 1470 on average out of each. I switch them every 2 weeks just to keep them fresh.

Great news, I'll be buying these batteries soon then

Just got these myself yesterday. Granted I've only had them one day they have been great and are equal if not better than my original battery. Again this is only after one day use so hopefully it stays the same.
But so far I have 4.25 hours of on-screen time
30 min of GPS with imapmyrun
30 min of Pandora(for my run)
Total time: 1day 2 hours and have about 7 percent left
Wifi and GPS were always on even when not in use. Regular setup of gmail, and yahoo to push my emails

I hope you guys are aware of how lithium ion's work... which these are. I'm positive someone has already said this in some other section, but it should be known as this applies to practically all phones.
Deep discharging frequently will damage the batteries, best not to run these batteries all the way down just because you can....
Heat will kill the batteries quicker than just about anything you throw at it. When you guys deep discharge and have a prolonged recharging time the phone does get hot, also leaving the phone/battery in a hot summer car... well...
Time is another issue. The batteries degrade with time/age, whether you use them or not. If a seller is selling you a "new" battery that's been sitting on their shelf for a couple of years, you're going to get a gimped battery despite it being "new".

I recently got a couple of these batteries, charged them with the wall charger then when i put them into phone, didn't work phone saw them as at 0% and switched off , (yes made sure i put them in the right way.)

heathroi said:
I recently got a couple of these batteries, charged them with the wall charger then when i put them into phone, didn't work phone saw them as at 0% and switched off , (yes made sure i put them in the right way.)
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Sounds like you did something wrong. 2 batteries? I don't care how junky you might find them they should have at least worked. Guessing you did something wrong woth the wall charger. Try charging them in your phone.

replacement battery

can anyone recommend a uk supplier for a bp6x battery that the milestone 2 recognises? or ideally a seller on ebay as i prefer to use paypal? i tried one that said "genuine motorola battery" when it arrived i plugged it in and the dreaded "?" appeared and the phone refused to recognise it. so it was obviously a fake. almost all the listings ive seen appear to be copies. i dont mind a non original aslong as its recognised by the phone and works... the only original battery seller i can see are second hand ones and id rather have a new one if possible. thanks

im interested to same problem ... so up +1!

Rule of thumb is don't buy batteries off ebay.
I was considering purchasing second hand ones, and even considered getting a droid 2 battery second hand, so at least it might be genuine moto, but thought better of it and feel validated with my choice.
At the end of the day, the battery can potentially fry your entire phone the second you connect it. You can't seem to get them direct from moto, but I'd suggest contacting your service provider and see if they can order genuine parts.
I suggest getting a portable charger for those outings where you know you will need some more battery life. Get a car charger, and if possible, a spare charger for work. Than most of your bases are covered and safer too

I'd purchased 2 from a seller on ebay and both work fine - no ? icon whatsoever, even though they're clearly fakes (no hologram). Will give it a week and see how they're lasting, and ill pass on the seller ID. They're handy to have as they can easily fit into a wallet and do wonders if you're getting tore into the Friday night scene.

ive got two spare chargers, and a car charger DreadpirateDan but my original is getting a bit knackered. itll jump from 80% to 40% in one go. then 40% down to nothing. doesnt last anywhere near aslong as it used too. so definitely time for a replacement. i got my phone on ebay so dont have a service provider to contact.
thanks gogz, let us know how u get on. i picked up one of the genuine second hand ones on ebay and it works fine. but its actually older than the one i originally had lol.

hey gogz let us know how ur batteries goes then.

anothadave said:
itll jump from 80% to 40% in one go. then 40% down to nothing.
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Holy moley that's crazy as, what do battery diagnostics tell you of your battery health etc? (if they even work, lol)
Also, have you tried battery calibration? That issue just sounds crazy, perhaps that might help?
EDIT:
Maybe you should get AnTuTu Tester off the market and run a battery test (will require your phone to be out of action for a few hours rapidly discharging though )
I scored 358 and am placed just above HTC HD2 and below LG Optimus 2X. The Galaxy S2 doesn't seem to have scored much more than me going by the bar graph - I've allways thought my battery to be shocking and potentially damaged health wise. So maybe that could give you an idicator as to how it's holding up, just for curiosity sake.

yeh tried that. the batterys just old thats all. theyre only good for a 1000 charges or something. so charging it couple times a day for over a year soon adds up. as they age the voltage becomes more erratic and it doesnt hold its charge.

I bought 2 original BP7X from ebay (and one bigger cover) and they are perfect.

djlooka said:
I bought 2 original BP7X from ebay (and one bigger cover) and they are perfect.
Click to expand...
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+1
BP7X is the way forward buddy. Can abuse the phone all day long and have 50% by the end with custom ROM and Juicedefender. I'm sure with light use you could get a week out of the thing.

ms2 is enough busty :F with bp7x and backcover is like to have a notebook in your pants.
i wish a batery that doesn't needs a backcover and works good without any block

This was were I got my batteries from guys. I've tested them both quite extensively over the holiday season and they have lasted well. Has proved to be a good investment actually as I sucked all the juice out of my phone taking 720 video at a gig over NYE and needed the phone to regroup after it. Hope this helps you. I also got one of those docks with the battery slot in the back to charge them up as a wee christmas present to myself too. I'm getting geeky in my auld age.

hey gogoz with that battery can u see how much % of juice remains ? and can u recharge it from your phone?

Yup. No problems on both counts there.

I have to say that I purchased one of those BP7x 1800mAh batteries and I am not impressed at all.
It barely makes 2 days without data connection always on.
Still I am using the phone underclocked at 800 mhz with screen on and everything forced at 300 when the screen is of wit setcpu.
It takes about 3 hours to burn 10% of charge

Well it only adds like 30% (or something?) extra life.. so if your normal life span used to be about 36 hours then 46 (barely 2 days) is just about right.

for replacement battery i would higly recommend "mugen" batteries. their average performance exceeds the OEMs. But if you go for the heavyweight usage, try their 3300mAh [HLI-A855XL] for milestone. not cheap though compared to ebay deals, but worth it quality wise.

algarues said:
I have to say that I purchased one of those BP7x 1800mAh batteries and I am not impressed at all.
It barely makes 2 days without data connection always on.
Still I am using the phone underclocked at 800 mhz with screen on and everything forced at 300 when the screen is of wit setcpu.
It takes about 3 hours to burn 10% of charge
Click to expand...
Click to collapse
2days! lol. ive never gone more than 24 hours even with the original battery fresh out of the box from the day i bought the phone. i can only dream of going two days without a charge

Hey guys! I wanted to buy this:
http://www.ebay.es/itm/NEW-MOTOROLA...299866?pt=PDA_Accessories&hash=item43af074c1a
Will that battery fit the Milestone 2? Are the accessories the same for the Droid2 and the Milestone 2?
Thanks!

zkyevolved said:
Hey guys! I wanted to buy this:
http://www.ebay.es/itm/NEW-MOTOROLA...299866?pt=PDA_Accessories&hash=item43af074c1a
Will that battery fit the Milestone 2? Are the accessories the same for the Droid2 and the Milestone 2?
Thanks!
Click to expand...
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I have a Droid 2 BP7X and it works fine in my MS2. I'd be wary of the Chinese writing and the very cheap price on the link you provided though. And you will need a new battery cover (mine was supplied with one).

What battery should I buy?

My stock battery is shot. It will drain from fully charged down to nothing in an hour of browsing the net. I have tried everything to calibrate it and have tried different ROMs but still the drain is horrible.
I saw a 1900 anchor (ankor?) battery on amazon for $19. Is that the one that everyone buys?

ImHuge07 said:
My stock battery is shot. It will drain from fully charged down to nothing in an hour of browsing the net. I have tried everything to calibrate it and have tried different ROMs but still the drain is horrible.
I saw a 1900 anchor (ankor?) battery on amazon for $19. Is that the one that everyone buys?
Click to expand...
Click to collapse
Yes. http://www.amazon.com/Anker-1900mAh-Battery-Sensation-Mytouch/dp/B0053EZJMC
It works great. Though l don't use my phone heavily. I mostly use it at home when phone is plugged in. But still it last much longer than stock.

Most people buy Anker battery and are very happy with it. I personally wanted more juice so I bought Mugen 3800mah battery. With Mugen I get with extremely heavy use around 26 hours of use. With moderate use I get around 36 hours. Light use 48 hours. But one problem with mugen is you will have to replace your back cover and your phone will be thicker to accommodate the battery. For me personally, I was after extreme battery life so the thicker phone didn't bother me at all. Another issue is price. Mugen is five times more expensive than Anker. But for me, I'm keeping my phone for awhile so it was a investment. But most don't want to deal with those issues so they choose Anker. It all depends on what you want. I recommend you start with anker, then if you decide you want more juice, go with mugen. But for most Anker is just fine. It's a good battery and will give you extended use. If you want extremely long battery life, go with mugen.
Sent from my DKOSP using xda premium

webharsh said:
Yes. http://www.amazon.com/Anker-1900mAh-Battery-Sensation-Mytouch/dp/B0053EZJMC
It works great. Though l don't use my phone heavily. I mostly use it at home when phone is plugged in. But still it last much longer than stock.
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This is probably a stupid question but you can charge the battery by plugging your phone in like usual right? I see that some of them come with a wall charger where you have to plug the actual battery into that.
realsis said:
Most people buy Anker battery and are very happy with it. I personally wanted more juice so I bought Mugen 3800mah battery. With Mugen I get with extremely heavy use around 26 hours of use. With moderate use I get around 36 hours. Light use 48 hours. But one problem with mugen is you will have to replace your back cover and your phone will be thicker to accommodate the battery. For me personally, I was after extreme battery life so the thicker phone didn't bother me at all. Another issue is price. Mugen is five times more expensive than Anker. But for me, I'm keeping my phone for awhile so it was a investment. But most don't want to deal with those issues so they choose Anker. It all depends on what you want. I recommend you start with anker, then if you decide you want more juice, go with mugen. But for most Anker is just fine. It's a good battery and will give you extended use. If you want extremely long battery life, go with mugen.
Sent from my DKOSP using xda premium
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Thanks for the response but I think that is a little overkill. I will probably get a new phone before that kind of price is worth it.

ImHuge07 said:
This is probably a stupid question but you can charge the battery by plugging your phone in like usual right? I see that some of them come with a wall charger where you have to plug the actual battery into that.
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Yes. Anker simply replaces your stock battery. Same shape size.

Is this Anker really that good? Beacuse I always buy the batterys from ebay (just like the ones for my DSLR) and have now a no brand 2430mAh using for almost a year and can use it a whole day without problems. Costs me only $12 and free shipping.

I bought 2 Anker batteries and a charger for $30US, I think. No regrets.

ImHuge07 said:
My stock battery is shot. It will drain from fully charged down to nothing in an hour of browsing the net. I have tried everything to calibrate it and have tried different ROMs but still the drain is horrible.
I saw a 1900 anchor (ankor?) battery on amazon for $19. Is that the one that everyone buys?
Click to expand...
Click to collapse
I bought my Anker 1 year ago and it still pretty good!

Get Anker.
An important thing to consider is anker has a 1 year warranty. And they WILL honor their warranty. I bought 6 batteries for my families LG Optimus Vs (Our first smartphones) and 1 battery went bad after like 6 months. I called them up a few months later when I realized I had a warranty, and they sent me replacement! (it was like 1 month before my warranty ended) And all they wanted was the serial numbers of the old batteries, however the original ones didn't have numbers so they instead just wanted a photo. (Which now that I think about it I never sent... ...)
Also, one of the chargers (that I bought with 2 batteries, a few months before that set of batteries I mentioned above) fried for some reason after about 8 months. So I left it on the shelf hoping I might be able to fix it. By the time I realized I had the warranty it had been over a year since my purchase. Bummer. So I called them up explained it went bad several months ago but I didn't know about the warranty, could they send me a replacement? And even though I was no longer in my warranty they sent me a new one.
Another thing is, for me, having spare batteries is a MUST as I have a LOT of free time at work. (I'm a background actor, and most of the time we have to do whatever we want) And continuous use (Browsing the web, playing games, reading news, watching TED AIR talks) drains a battery in 3 - 5 hours. And it can sometimes be 16 hour days, with no place nearby to plug in a charger. That's another awesome thing about Anker sets, the stand alone charger. I have MANY times been at work with one of my batteries dead. I looked for and found an outlet, a little far from holding, (where we are while we aren't working) and just plugged a dead battery into the stand alone charger and into the outlet. I can go to work or just go about my business not tethered to the wall, and 3 hours later my battery is charged. I then would switch one of my more drained batteries for it and continue like that.
So ultimately its up to you, but I would recommend getting a set of 2 Anker 1900mah batteries and a charger for $30. However if the charger isn't a big deal for you then look up some $7 Evo 3D batteries on Amazon. They are 1730mah, and are pretty decent.
Bragging here, I currently have around 10 batteries! Only 2 are anker. the others are 5 EVO 3D and 3 Sensation stock batteries I got for only $2 each! I found someone on Amazon selling them for $2 each with $4.50 shipping, only the shipping combined! So I got 8 batteries AND five 16GB Class 4 Sandisk MicroSDs for only $54 total. What a deal. lol.