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I have just bought a new 2000mAh battery with a cover that fits the Ignito from ebay (from Gps4Less, I found out they have a website too) and so far I am very impressed. The quality of the cover is ok, much better than the ones for the Diamond arriving from China. It came from the UK so I did not have to wait long for it either. I charged the battery and after about 8 hours it is still at 96%. I have attached some pictures so you can see how it looks. There is no effect on the GPS performance, I got a GPS fix with this battery inside the house in about 30 seconds after starting Tomtom. The price was good about £16 including delivery, just do a search on ebay for 2000mAh battery for Ignito and you'll surely find it. I have been waiting for this one for a long time. I will keep you updated with the battery performance over the next few days. The only problem I have now is to find a suitable case for it, but it will probably make the phone even bigger. I guess the Invisible Shield might be a better option. So far they only have it for Diamond, not the Ignito, but I might give it a try. Now I won't fear of running out of power while listening to Internet Radio on my way to and from Uni
ugly as hell...
I will never understand why people get a SLEEK phone like the Diamond and stick in a FATASS battery and mess up the fantastic dimension of the phone...
You don't always have to use that battery, but sometimes you need more power, and that's when I'm gonna use it, I will not use it every day, and it's everyone's choice in the end, you can either carry 2-3 spare batteries in your pocket or have this when you need it. It's not too bad, but as I said, it's a question of choice. I could have got the original 1340 mAh battery, the back cover is flat and looks better but I don't think it would have been enough power for my needs.
P.S. Battery is now at 87% after 24 hours of normal use with 3G on, with the phone checking emails once per hour. Not bad...
cant find battery in ebay
hi,
can you send me the link.....can t find the battery .....
thx
[email protected]
j,
Hi, here's one: http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWNX:IT&item=350144524998
or this one http://cgi.ebay.co.uk/O2-XDA-IGNITO...photoQQcmdZViewItemQQ_trksidZp1713.m153.l1262 which includes a cradle as well.
Over two days and the battery is at 72% with 3G on and standard settings, usually by now I would have had to charge my battery. The best I got from the standard battery was close to 3 days with the 3G turned off(GSM mode).
Thanks for that hind, I've bought it this morning because I need an extend battery too!
Thanks mate!
Hope you get that out of your pocket when no one's looking.
At least the official one didn't fall from the ugly tree:
http://www.expansys.com/p.aspx?i=173907
Honestly, it doesn't look that bad when you have it in your hand, and it lasts way more than the official 1350mAh battery that expansys is selling for over £50. This one was only £16. Now onto 5th day without charging, battery 49%. What more can I say?
Just ordered this battery as after 1 day out using WiFi to check mail and other websites as well as playing games on the car journey and listening to some music my standard battery died after less than 10 hours!?! This should rectify this problem....
Thanks zoltar
Quick qusetion though, does it actually fit in any Ignito/Diamond cases now? (I don't use one just curious)
ant611982 said:
Just ordered this battery as after 1 day out using WiFi to check mail and other websites as well as playing games on the car journey and listening to some music my standard battery died after less than 10 hours!?! This should rectify this problem....
Thanks zoltar
Quick qusetion though, does it actually fit in any Ignito/Diamond cases now? (I don't use one just curious)
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It does fit XDA Ignito from O2, it won't fit the original Touch Diamond, the back fitting is different. So, order this one only if you have an Ignito, otherwise look for a Diamond back case.
My extended battery just died this afternoo after more than 6 days since being charged, and only because I used my phone to listen to internet radio for more than 2 hours (it was 29% this morning). The last mobile phone to last me that long was a Philips with a black and white screen that I had back in 2000 - about 6-7 days. And it didn't have internet, music, office mobile, touch screen or colour screen.
I believe that if the manufacturer would make the back of the case flat, getting rid of the 'hump', a lot more people would buy it as many are being put off by that (see previous posts). But the battery is brilliant. I could go on a week holiday without taking any charger with me
I just have the phone next to me when I go to bed and attach it to charger.
It lasts the whole day with HSDPA and Bluetooth on (for carkit), and even some navigation will work. For car trips I have the car charger.
I never, but then NEVER had any battery-issues in my everyday use. I have a feeling everyone is just not needing the battery.
What is wrong with charging regularly overnight?
And yes, it looks damn ugly.
Oh，come on. you're advertising your ebay shop, right?
zoltar99 said:
It does fit XDA Ignito from O2, it won't fit the original Touch Diamond, the back fitting is different. So, order this one only if you have an Ignito, otherwise look for a Diamond back case.
My extended battery just died this afternoo after more than 6 days since being charged, and only because I used my phone to listen to internet radio for more than 2 hours (it was 29% this morning). The last mobile phone to last me that long was a Philips with a black and white screen that I had back in 2000 - about 6-7 days. And it didn't have internet, music, office mobile, touch screen or colour screen.
I believe that if the manufacturer would make the back of the case flat, getting rid of the 'hump', a lot more people would buy it as many are being put off by that (see previous posts). But the battery is brilliant. I could go on a week holiday without taking any charger with me
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It arrived this morning, doesn't have a "massive hump" and actually feels ok whilst in hand. (Even I was surprised) Just one quick question do you charge yours with the cradle or does your original Ignito charge it no problem?
Thanks
p.s I just got an cradle, usb charger and mains charger that fits the cradle... no instructions ?!?! ah well can't be rocket science can it
some1l8 said:
Oh，come on. you're advertising your ebay shop, right?
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If you were referring to me , you are wrong mate! It's not my shop, I just happened to buy it and found it a good product and thought I could help by posting pictures of it and my experience. If you check my other posts on this forum, you will see I have also bought other products for my Ignito on ebay from other shops.
To ant611982:
I charge mine either using the phone (I got mine without the cradle) or a separate charger I bought on ebay that charges the phone and a spare battery, but doesn't have a cradle. It can charge both the phone and a spare battery at the same time without any problem.
Zoltar do you use a case with this extended battery on? I can't seem to find one to fit. ONLY downside.
Thanks
ant611982 said:
Zoltar do you use a case with this extended battery on? I can't seem to find one to fit. ONLY downside.
Thanks
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I'm afraid I have the same problem I was thinking of buying the invisible shield, but i couldn't find one cut specially for the Ignito.
Edit: I found the following cases that might fit. They are for the Touch Pro, but should fit a thicker Diamond as well. I still have to make up my mind which one to choose. There are others on ebay, but most of them in Hong Kong, and if you are prepared to wait about 2 weeks for delivery, fine.
http://cgi.ebay.co.uk/Belt-Leather-...14&_trkparms=72:1301|66:2|65:12|39:1|240:1318
This one seems really good to me.
http://cgi.ebay.co.uk/PDair-Black-L...14&_trkparms=72:1301|66:2|65:12|39:1|240:1318
This one is from HK, but it is symilar to the original HTC case and it flexible on the sides.
http://cgi.ebay.co.uk/L1u-Leather-P...14&_trkparms=72:1301|66:2|65:12|39:1|240:1318
This is also from HK but it is a lot cheaper than the others. Looks ok in the pictures, not sure about quality. Not leather though.
I got my battery a few days ago and had used it since then! It's working really great, it feels that my Diamond would run more than doubled as with the stock one and GPS is also working!
Now I love my new device much more!
I would rather have this battery over the official one for the extra battery life, but wouldn't be able to live with the cover that comes with it. Anybody know if it'll fit into the offical extended battery case (http://www.expansys.com/p.aspx?i=172103)?
can replace tornado battery from other phone battery because tornado battery very rare in my country.
3. Change the battery (its custom 1200mAH battery which I ripped off from sanyo's battery case and NOKIA's (umm forgot) with solid 6dayz backup on wifi)
http://forum.xda-developers.com/showpost.php?p=3590585&postcount=1
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ebay.com!
You still can have an original battery. Just go to ebay.com and search for "st26 battery" in "Cell Phones & PDAs". You'll find several options from $3 to $12 + shipping. I bought a couple this way and am happy now. Just look for original Celxpert or Sanyo brand (ST26B or ST26C). Don't buy cheap fakes labeled Samsung (ST26A). They cost the same but have less capacity.
In addition you can buy an external charger - it's very comfortable if you have more than one battery. And there are also high capacity batteries about twice of the original. They come with a spare cover because they won't fit in the phone with the old one. I can't say anything about this one.
Good luck and long live Tornado!
Those battery seems too cheap, do you trust them?
[QUOTE Don't buy cheap fakes labeled 2Samsung (ST6A). They cost the same but have less capacity.[/QUOTE]
thanks but before buy it (Samsung (ST6A)) and capacity is very low abut (12 hr) what solution for increase capacity Samsung ?(ST6A) . i buy it about 15$
karhoe,
I have one battery of all three types I've described. Well, the Celxpert was new and the best of all - absolutely the same as original. Sanyo was of the same manufacturing quality and capacity, although looked a bit used. 'Samsung' was made of poor quality materials, was not exactly rectangular and it is definitely not Samsung at all, just a fake.
The first two last almost 24 hours (I listen MP3s for 1 hour a day, make 5-8 calls, sometimes use Opera Mini). And the 'Samsung' one now doesn't even last 12 hours.
BTW, I use one of the latest WM6.1 Standard ROMs, they are all pretty 'hungry' for energy. When I tried WM6.1 Pro and WM6.5 they seemed to work noticeably longer.
smoma,
I don't think there's a way of considerable increase in capacity since it is a hardware problem. You can just use it until it dies, just have a spare one with you.
smoma said:
can replace tornado battery from other phone battery because tornado battery very rare in my country.
Click to expand...
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i really need this instruction
help me please
Bro, I am back and have read your PM
My battery is completely debranded (means that "A mobile techie did the job for me. As far as I know he shown me sanyo battery case (perfect for tornado) then he ripped off a nokia's battery cells and made a custom battery for me). My problem of battery charging is solved since I am using 1A charger from now on
NeHow, What u really need is "mAH rating of battery", Battery voltage that is required (i think its minimum 4volts and as per required (I dunno what is the ower rating of official battery and i am too lazy to google for it lol)
As my celetask shows:
Tick Count: 23:39
Main Battery 91% (charged it about 17 hours before, and I have used about an hour of wifi on that)
Voltage: 3942mV ~ 4Volts
Curent: 122mA
A battery rating of more than 1000mAH is fair for gud battery backup. As a consequence the charging time is taken as far more. Since a higher mAH battery requires a Higher mAH adapter too
i-e 1000mAH battery requires 1A current for an hour to fully charge orr vice versa
I really catn help in ripping the battery since there is some battery cells ripping is involved which that mobile techie is afraid to leak out. I asked him again after reading ur PM
P.S you can check the market out for custom made batteries on above criteria
I AM NOT RESPONSIBLE FOR ANY KIND OF DEMAGE TO YOUR PHON REGARDING THE RIPPING OF UR BATTERY
request for Mr dark_prince
request for Mr dark_prince
MR dark_prince you say in previous post :
Change the battery (its custom 1200mAH battery which I ripped off from sanyo's battery case and NOKIA's (umm forgot) with solid 6dayz backup on wifi)
please help me and send screen shot of your battery i am very need to your guide .
I really catn help in ripping the battery since there is some battery cells ripping is involved which that mobile techie is afraid to leak out. I asked him again after reading ur PM
Click to expand...
Click to collapse
very tanks i am wait...
can use your nokias battery without ripped off sanyo's battery ?
i am electronic engineer and able to if yuor guide me and say me more information about modle of nokia's battery and battery's pin connector
wait
i am waiting ...
http://www.cellularaccessory.com/eb145152yzbstd.html
Are all the batteries from the galaxy series the same?
Has any one tried it?
ranchosteve said:
http://www.cellularaccessory.com/eb145152yzbstd.html
Are all the batteries from the galaxy series the same?
Has any one tried it?
Click to expand...
Click to collapse
It will probably fit, I don't doubt it but there seem to be a battery door as well and by the looks of it. Although it seems its for the fasinate only.
the fascinates battery fits but when ever I charge the phone, it says battery not detected, and the phone does not charge. more than likely you'd get the same error with the extended one.
all the galaxy s phones use the same 1500 mh battery i have the epic but i bought the battery sold for the vibrant and the have the same exact serial numbers on them.
says it needs a xl door
http://cgi.ebay.com/SAMSUNG-EXTENDE...200369?pt=PDA_Accessories&hash=item255d7c0b31
http://cgi.ebay.com/2200mAh-Extende...226762?pt=PDA_Accessories&hash=item1c1473f04a
I just did a search for Samsung 2200mah and came up with a 3 page list of batteries and phones. I'd be completely fine with a thicker phone to get longer battery lfe.
I just did a search for Samsung 2200mah and came up with a 3 page list of batteries and phones. I'd be completely fine with a thicker phone to get longer battery lfe.
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has any1 tried these batteries?
I bet the batteries are fine, it's getting the door to fit back on being the next issue.
i ordered me one
now waiting for epic battery cover
Since the battery is thicker, you could halfass the cover by simply cutting an opening in it just enough that the battery could protrude from it and still allow the stock cover to snap on. Other than it being pretty, the battery hump would stick out less than the cover that is included on that eBay Fascinate link. Or maybe you could get really fancy by cutting off the bump from the Fascinate cover and epoxy it or something to your existing Epic cover.
As I'm sitting here writing this, I'm thinking about just doing it myself...dremel out the hump and epoxy it to the Epic cover, using enough epoxy to create a smooth transition lip instead of an actual bump, light sanding to clean up the epoxy work and then wrap it in some 3M Di-NOC carbon fiber graphics while I'm at it.
The ONLY problems I've ever heard with some of the aftermarket batteries (while I was on the Samsung Moment forums) was that occasionally people would get an incompatible battery warning on their phone, but could easily be resolved with a reset. Once you get yours, keep us posted how it works out. When I first got my phone, the battery was completely dead, but I was thankful. I read random stories (which are debatable) as to if battery conditioning is even necessary or if it even matters. Either way, I put my phone on the wall charger (faster than USB via a computer) and let it charge completely. I then ran about 4 streaming music apps at once to completely kill the battery, then did a nice slow charge on the PC. While I can't say if my battery life is good or bad compared to anyone else since everyones usage is different, at least I can say I tried to condition it. My point is that I've tested the life of batteries this way when swapping between older and newer batteries on my Treo as well. Charge them till their full, run a battery intensive app (streaming for example) and timed how long it took to die. I have Treo batteries that lasted as little as 1.75hrs and as much as 3.5hrs, so naturally I keep the 3.5 in there as much as possible. You could test your current battery vs the extended battery the same way. I chose streaming as my testing of choice since I stream music while working anyways, so it wasn't anything out of the ordinary...I'd just let it go until the music stopped, noted the time and swapped to the next battery. Maybe you could do the same to confirm the difference in life between the 1500 and 2200 battery, otherwise we'll never know.
On a side note, I like this cover http://cgi.ebay.com/3000mAh-Extende...788955?pt=PDA_Accessories&hash=item5adbfc1b1b since it thickens the whole phone vs just adding a hump. That hump would just be constanly snagging the edge of my pocket everytime, hence why I wanted to make it a smooth transitional edge like I mentioned above. Also, this battery is 3000mah, 2x the stock Epic battery. Is the i9000 the same height and width as our batteries? It'd be an even larger hump, but twice the battery...hmmmm.
One thing to keep in mind about battery ratings is that it is dependent on discharge rate. A battery discharged at 1 c will have a different and lower apparent capacity than the same battery discharged at 0.1 c. Thus a larger battery benefits in two ways. Physical size and lowering of the c rate based on the same amp draw. This is where less reputable battery makers cheat. They will put an incredibly small load on a battery to achieve a higher rating.
Sent from my SPH-D700 using XDA App
So, what's your point? How does one distinguish a good battery vs a bad battery then if we're going to try and test these?
I'm waiting for Seidio to release this battery. They have an extended battery for the Evo and it gets good reviews overall, as seen here. Super expensive and makes the phone super bulky though
Why wait for Seidio and their overpriced batteries? People have been buying the extended batteries for the Moment for years via eBay, so why would any of the Galaxy S line batteries be any different for the sub $20 range?
m5james said:
So, what's your point? How does one distinguish a good battery vs a bad battery then if we're going to try and test these?
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The point is that unless they are giving you a physically larger battery, not to put too much faith in the MaH ratings of batteries. Especially ones out of china with no brand to speak of. The difference between a 1500mah and a 1700mah is likely in how they discharged to to rate it.
If you can find it, the C rate on discharge is a good indicator of quality in lithium batteries. Higher C rate discharge have lower internal resistance and are made with better materials. I'm not sure how likely you are to find the full specs on a phone battery.
In a test environment its not too difficult to figure out which is which. Put a temperature probe on it, and then put a high load on it. The one with the lowest temp is probably your best battery. (same size anyways)
Assuming the 2200mAH batteries are genuine Samsung OEM, I'd love to see one get tested by the guy at batteryboss.org to see how they rate under the same test conditions as the other batteries he's tested. If they end up being real, honest-to-god 2200mAH @ 250mA discharge, that would put them right on par capacity-wise with the average, much thicker no-name nominally-3500mAH Evo/Desire/Hero batteries from eBay. 1500 definitely isn't big enough, but a real 2200mAH battery with back that's large enough to accommodate it (preferably with a sculpted, rounded profile instead of a boxy pregnant lump) might be a nice alternative to a full-blown ~2800mAH-nominally-3200/3500mAH extended battery from Seidio.
In any case, I think it's been well established by now that the "extended" batteries that are the same size, but ~100mAH larger than stock, are almost a complete waste of money. Even when they DO last 30-60 minutes longer, you seriously have to question the sanity of spending so much for so little.
That said, I suspect that most of the cheap 2200mAH batteries that will eventually end up on eBay will end up testing out at around 1500mAH.
Geekybiker said:
The point is that unless they are giving you a physically larger battery, not to put too much faith in the MaH ratings of batteries. Especially ones out of china with no brand to speak of. The difference between a 1500mah and a 1700mah is likely in how they discharged to to rate it.
If you can find it, the C rate on discharge is a good indicator of quality in lithium batteries. Higher C rate discharge have lower internal resistance and are made with better materials. I'm not sure how likely you are to find the full specs on a phone battery.
In a test environment its not too difficult to figure out which is which. Put a temperature probe on it, and then put a high load on it. The one with the lowest temp is probably your best battery. (same size anyways)
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I think I got what you mean. Either way, both the 2200mah and 3000mah battery are incrementally large than the next vs the stock 1500mah battery, so I would assume that each battery will in fact store more of a charge.
has anyone tested whether these batteries work and charge normally? If they do work, you can grab a cheap hard case on ebay for 3 dollars and cut a hole through it for the battery. It will be ugly though, unless you figure out how to make it look nice
Why don't you go on Ebay and buy yourself a good extended battery 2800 mah and use your phone for 2 full days without charging? http://cgi.ebay.com/Sprint-Epic-4G-...450945198?pt=US_Batteries&hash=item1e5f7b74ae USA supplier, great guy and has excellent customer service.
kevinjmoore said:
Why don't you go on Ebay and buy yourself a good extended battery 2800 mah and use your phone for 2 full days without charging? http://cgi.ebay.com/Sprint-Epic-4G-...450945198?pt=US_Batteries&hash=item1e5f7b74ae USA supplier, great guy and has excellent customer service.
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Or save yourself 15 bucks and get this 3500mah battery and get 3 full days without charging.
http://cgi.ebay.com/3500mAh-Extende...Accessories&hash=item3cb2c4bb14#ht_4129wt_916
Does anyone have any experience of http://cgi.ebay.co.uk/ws/eBayISAPI....87534&ssPageName=STRK:MEWAX:IT#ht_2130wt_1132
It would be better if you get another geniuine htc desire battery and just alternate between them because somethimes these kinds of high capacity ones are just crappy chinese fakes and some times give you less battery than the original
Sent from my HTC Desire using XDA App
A friend of me is using this 2400mAh battery
http://cgi.ebay.co.uk/EXTENDED-HIGH...831?pt=LH_DefaultDomain_3&hash=item27b96b6d47
This doesnt make your Desire too fat like the 3000mAh and got significantly better times than the battery you chose because the stock battery also got 1400mAh, would be "just" a extension about 400 mAh...
Disadvantage: you can't use your stock protection case (if u do) because theres also a new case for that bigger battery
that battery is utter crap. worse than the orginal imo.
he4dhuNTeR said:
A friend of me is using this 2400mAh battery
http://cgi.ebay.co.uk/EXTENDED-HIGH...831?pt=LH_DefaultDomain_3&hash=item27b96b6d47
This doesnt make your Desire too fat like the 3000mAh and got significantly better times than the battery you chose because the stock battery also got 1400mAh, would be "just" a extension about 400 mAh...
Disadvantage: you can't use your stock protection case (if u do) because theres also a new case for that bigger battery
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Click to collapse
could you maybe post a picture of what his phone looks like?
Thanks
I would also be interested in a high quality, high capacity replacement battery for my desire.
Any1 know an actually good battery?
Sent from my HTC Desire using Tapatalk
I've just bought an original battery from this seller for 8 GBP.
http://cgi.ebay.co.uk/HTC-35H00132-...aultDomain_3&hash=item1c1c1162c9#ht_720wt_906
I have only done one full cycle on it, but I think it is genuine. It is a tiny bit different from my original, but I think not all HTC batteries are the same.
I am using this battery http://www.dealextreme.com/p/replac...-battery-with-charger-for-htc-desire-g7-45427 of course its not 1600, it is about 1300-1400 mah but for now it last for me same as original battery which is almost 1 year old now, so not so bad to use it as spare battery when you out of juice.also you get wall charger-while one batery charging you can use your phone with another one,but don't recommend to charge it in desire-you know its made in china but for me it works ok, i am totally happy with it.so if you decided to buy not original battery,then buy and wall charger(or buy that from DX), because you dont want to explode your desire. do you? goog luck. regards
Yeah I bought that Chinese 1800amh battery too and it's terrible! I calibrated it and as you do with new batteries and it simply doesn't hold a charge. The stock battery lasts much longer when properly calibrated! I don't even think it's 1800amh. I'd suggest getting the Mugen Power battery. I got one for my old HTC Legend and it lasted ages!!! It was more expensive like between E30 - 40 but well worth it! They have a 1600amh one for the Desire, if you want a good battery that lasts, I'd strongly recommend it.
Hi all,
Looking at maybe getting an extended battery for my S4, but I want to keep it as slim as possible, while also being worthwhile having though, no point something with a useless battery gain
I really like the design of this one where the phone sort of 'slots' in for two reasons:
1. I think you can use the original battery as well as the extended?
2. I like the way it doesn't look like it will add too much thickness
http://www.amazon.co.uk/GooseWhite-...4&keywords=samsung+galaxy+s4+extended+battery
Only thing is that has useless reviews
Does anyone have one they would recommend?
Thanks!
I had one similar to that. I don't think it's worth it. It gets hot when it charges and it doesn't feel like I'm getting full extended battery cause charging and using your phone cuts the battery imo. I'd just get a regular extended battery. I have this case it's expensive but I like the size and it does add extra battery. It's uNu Unity Samsung Galaxy S4 Battery Case [Black/Silver] - External ... http://www.amazon.com/dp/B00GBHRHHK/ref=cm_sw_r_udp_awd_GvRjtb1C8GNQN
Other than that I was using the hyperion 7200 mah battery for awhile. But the unu is my favorite at the moment because of the size
Sent from my SPH-L720 using xda app-developers app
http://gorillagadgets.com/products/...cs-with-s-beam-nfc-free-protective-back-cover
You'll thank me later.
Majin101 said:
I had one similar to that. I don't think it's worth it. It gets hot when it charges and it doesn't feel like I'm getting full extended battery cause charging and using your phone cuts the battery imo. I'd just get a regular extended battery. I have this case it's expensive but I like the size and it does add extra battery. It's uNu Unity Samsung Galaxy S4 Battery Case [Black/Silver] - External ... http://www.amazon.com/dp/B00GBHRHHK/ref=cm_sw_r_udp_awd_GvRjtb1C8GNQN
Other than that I was using the hyperion 7200 mah battery for awhile. But the unu is my favorite at the moment because of the size
Sent from my SPH-L720 using xda app-developers app
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Thanks for that
Hmm that unu does look quite good, if I'm correct it only adds ~1cm to the phone?
Looks very very nice actually! I think I'm going to leave it though, had a think and I'm always near a computer to charge my phone, or in the car, seems like £40 that can be spent/saved elsewhere
Thanks though
dmt010 said:
http://gorillagadgets.com/products/...cs-with-s-beam-nfc-free-protective-back-cover
You'll thank me later.
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Sorry but that is way too chunky looking for my liking. The Unu looks much more 'original' I'd say
I have just bought the uNu Unity battery case for my Samsung Galaxy S4 (August 2014) and I am very impressed with it. Coming from an Exogear Exolife Battery case (which I already like - bought it last year around November), the uNu Unity Battery Case is a significant improvement. I got back my full functionality of the USB port, which is compromised when you use a traditional battery case that piggybacks your phone on an external battery via the microUSB port (the battery case USB port is usually not data-capable - charge only). I also noticed a significant increase in battery life. With the Exolife Battery case, I use my Galaxy S4 for around 10 hours on a typical day before switching on the Battery case to charge the phone (around 15-20% charge remaining). The phone gets hot while charging and I only get it charged up to around 60-70% capacity before the battery case runs out of juice. Obviously having the phone on while charging from an external battery pack is not the most efficient mode of charging, so I get an additional 6-8 hours of moderate use out of the phone with the Exolife battery case.
With the uNu Unity battery case, I was able to use my phone for 19 hours (more than adequate to a typical day) with the battery life at 60% after that time. The last time I was able to use a smartphone with this kind of battery life was my old Palm Treo 650 which lasted 3 days on a charge for me...
Overall, I am very impressed with this battery case. The uNu Unity battery case works like an extended battery without the ugly backplate that typically comes with extended batteries. And you get to keep your NFC functionality since the NFC antenna of the Galaxy S4 is part of the battery. Also, unlike the Exolife battery case, the NFC signal is not blocked by the external battery part of the case so it remains functional.
There is some creakiness to the case when you handle it, but when I removed and re-installed the battery case, I managed to fiddle with it so that all its clips engaged properly, making the gap between the backplate and the new bezel flush, thus minimizing, if not eliminating the creakiness of the case.
And compared with the Exolife Battery case, the Unu Unity battery case is shorter and thinner as well.