Related
ive been a nexus s user for almost two days now and i noticed that my battery level stops at 96%. is this normal being as though gingerbread is up and coming and this is the first phone to have it? also i seen a thread on here that shows you how to push your battery to 100% but i also read that the phone may overheat.....im not too sure about that. i have done 2 charging cycles by killing the battery completely and recharging. with my heavy use that i did i got 7 1/2 hrs use. is that normal or is that bad? are there any tips and tricks or will there be a hotfix launched in the near future. thank you for any comments an questions.
charlieb620 said:
ive been a nexus s user for almost two days now and i noticed that my battery level stops at 96%. is this normal being as though gingerbread is up and coming and this is the first phone to have it? also i seen a thread on here that shows you how to push your battery to 100% but i also read that the phone may overheat.....im not too sure about that. i have done 2 charging cycles by killing the battery completely and recharging. with my heavy use that i did i got 7 1/2 hrs use. is that normal or is that bad? are there any tips and tricks or will there be a hotfix launched in the near future. thank you for any comments an questions.
Click to expand...
Click to collapse
See my post in the Accessories forum. The only way to get a true 100% FULL charge is to charge the battery via a wall charger. Since I bought a wall charger and couple extra OEM batteries on Ebay, my battery is lasting significantly longer.
turbodroid said:
See my post in the Accessories forum. The only way to get a true 100% FULL charge is to charge the battery via a wall charger. Since I bought a wall charger and couple extra OEM batteries on Ebay, my battery is lasting significantly longer.
Click to expand...
Click to collapse
i charge my battery to 100% without a wall charger.
but with a USB charger that i bought
ghost010 said:
i charge my battery to 100% without a wall charger.
but with a USB charger that i bought
Click to expand...
Click to collapse
What happens when you pull the cable out? Does the battery immediately drop to 97%? Since it likely does, then it's not truly charging to 100%.
turbodroid said:
What happens when you pull the cable out? Does the battery immediately drop to 97%? Since it likely does, then it's not truly charging to 100%.
Click to expand...
Click to collapse
mine did that earlier this morning i saw it charged to 100% and as soon as i unplugged it it dropped to 97%.
charlieb620 said:
mine did that earlier this morning i saw it charged to 100% and as soon as i unplugged it it dropped to 97%.
Click to expand...
Click to collapse
That's what everyone's does and why I pointed you to my post. Get a spare battery and a wall charger and charge your batteries to a true 100% like I do. They last WAY longer.
http://forum.xda-developers.com/showthread.php?t=955555
I've been doing that since day 1
standalone battery wall charger is the best
Sent from my Nexus S using XDA App
does it matter which wall charger I buy?
will this work? http://cgi.ebay.com/Desktop-Wall-Ba...191990?pt=PDA_Accessories&hash=item4156be62f6
Hi i dont know why my battery isnt completely charging! or the battery charger info is broken! anyone else not charging to 100%?
It probably hits 100% then starts draining slightly to keep it from over charging. Mine gets to 99% then I unplug and replug it and it hits 100. But that has happened with a lot of devices for me.
Happens on my evo as well. You can get around it by flashing a kernel that does trickle charging which I'm sure we'll get for the tf sooner or later.
Sent from my PC36100 using XDA App
Punchatron said:
Happens on my evo as well. You can get around it by flashing a kernel that does trickle charging which I'm sure we'll get for the tf sooner or later.
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
I would NOT use an sbc kernal on this battery, they are known to shorten battery life. Cell phone batteries are a dime a dozen, this thing is both non-user replacable and most likely not cheap.
Pretty sure its a lithium ion battery inside and you shouldnt overcharge those. You're best off keeping it between 30-90% and doing a drain and full charge once a month to prolong its life. The charger should stop charging when the battery is full on it's own anyways if you do leave it plugged in. I think it's a European law to have that as a safety feature, probably an American law for this too. So if the charger is staying hot a few minutes after your device has hit 100% charge, you've got a problem. Mine does get to 100% but yes it takes a while to top up, that's just the way these batteries operate.
Hello everyone
I was wondering if its ok to leave the transformer connected to the charger.
Is it like the Evo with trickle down when it reaches 100%
I dont want to over charge it. If it were my laptop i would disconnect the battery at full charge. But its not possible to do that with the transformer.
I want to keep my cycle count low and prevent over charing.
I also wonder what happens in a few years when the battery is shot...
Charging is what damages Li-Ion batteries... I'd recommend not keeping it on the charger all the time. Android will purposely not keep the battery at 100% to help avoid some damage.
Li-ion prefer to be around 20-80% charge.
When battery is 100% and you keep the charger connected, heat will begin to build up and eventually you will kill your battery.
I'd do as with a notebook: charge till 100%, then remove battery or charger (in case of the tablet charger ) . Then use your tablet and recharge when needed / desired. And from time to time a full charge / discharge cycle won't do any harm.
Just my 2 cents.
Regards.
These tablets don't automatically recognize when it's fully charged and turn off the charging?
Ravynmagi said:
These tablets don't automatically recognize when it's fully charged and turn off the charging?
Click to expand...
Click to collapse
They do. There are other threads asking why thier TF's don't show 100% when unplgged from the charger. Same as it does on my Evo.
I think pretty much every modern device recognizes a full charge and responds accordingly. In fact, MacBooks will throttle performance if the battery ISN'T kept in while the system is running on A/C.
Heat will damage a battery, but it's not heat from charging but heat from operation. If a notebook is poorly designed and the battery is near a heat source, then removing the battery might be a good idea (except with the aforementioned MacBooks), but that's independent of the charging issue.
I think it's fine to keep it plugged in. These devices are smart enough to manage such things. Of course, the TF's charging cable's so short it's hard to use when plugged in, but that's a different issue entirely.
CalvinH said:
When battery is 100% and you keep the charger connected, heat will begin to build up and eventually you will kill your battery.
I'd do as with a notebook: charge till 100%, then remove battery or charger (in case of the tablet charger ) . Then use your tablet and recharge when needed / desired. And from time to time a full charge / discharge cycle won't do any harm.
Just my 2 cents.
Regards.
Click to expand...
Click to collapse
From what I understand this process cannot and will not kill the battery. This did happen in the old type of batteries with the ,emory effect but these new batteries and the OS's management system for charging does not allow the battery to be killed.
it will heat up and that would happen as there is a flow of electricity but not to a level that would kill the battery.
Cheers
IS it normal to go from 4% battery to 99% in under 3 hours ?
I thought this was supposed to take 8 hours to charge.
Cheers,
gpearson1968
gpearson1968 said:
IS it normal to go from 4% battery to 99% in under 3 hours ?
I thought this was supposed to take 8 hours to charge.
Cheers,
gpearson1968
Click to expand...
Click to collapse
Yes that's normal. It's meant to take about 3hrs.
Thanks guys...
Still dont know about it. Because I think its like my EVO and technology got so good that my battery is protected.
I really dont want my transformer to become a expensive paper weight or non-mobile because after a few years it has 45 mins battery life.
I've got the first full charge and full depletion done. Is it ok to use while charging now as long as I fully charge and fully deplete it a couple more times?
error12 said:
Thanks guys...
Still dont know about it. Because I think its like my EVO and technology got so good that my battery is protected.
I really dont want my transformer to become a expensive paper weight or non-mobile because after a few years it has 45 mins battery life.
Click to expand...
Click to collapse
batteries will degrade over time....would you be keeping this tablet for over 2-3 years? a simple battery change could work if ever needed
I am no expert, but I have spent some time searching around the internet looking for information on the best methods for improving the life of a battery. Most of the information I have found said it is bad to completely discharge a Li-polymer battery. The articarles stated it was best to charge the battery when it reaches 20% to avoid shortening its life.
Sent from my DROIDX using XDA App
Batteries are like muscles - they like to be exercised.
Leaving the unit plugged in WILL NOT HURT YOUR BATTERY. Period. The charging circuitry in modern devices is smart enough to cut current to the battery once it has reached a certain level of resistance.
Batteries do not like being deeply discharged. Most devices will shut off before the battery gets too deeply discharged, but it's never a good idea to tempt fate by running it until the device shuts off.
What really determines a battery's life is the number of cycles it has been put through. A cycle would be a full charge followed by a full (or to a lower end threshold) discharge.
The old original Lithium Ion batteries used in laptops would usually last about 300 full cycles or so - about a year if you used it on the battery every day. Partial discharges of course only count as fractions of a cycle.
Given the life of these types of devices, considering we'll likely upgrade to the next big thing in a year or so, I don't think anyone here will come close to 'wearing out' a battery.
EMINENT1 said:
I've got the first full charge and full depletion done. Is it ok to use while charging now as long as I fully charge and fully deplete it a couple more times?
Click to expand...
Click to collapse
As stated, these are Li-Ion batteries, and they do not need to be trained. The only reason you might need to do any training is to calibrate Android's understanding of the battery (although I doubt you need to do a full discharge for that, either).
It's not going to suddenly kill it, but it will over time hurt your battery's life.
I went ahead and did a full discharge/charge cycle, but only because Asus said to do so in the manual. Maybe the copywriter just copied/pasted from a circa 1990's manual for a device with a NiCd battery, but I figured if they're suggesting it, I might as well do it.
Do you only use the HTC charger that came with your phone? MicroUSB is MicroUSB and it will charge from any charger BUT I have heard that different milliamp chargers can cause undesired effects in the battery (of any phone) such as decreased lifespan or less battery life in the short term. Any truth to this? Only reason I ask is because A) I'm curious and B) I got my Sensation yesterday, charged it with the stock charger at work but left it by mistake. When I got home, I charged it with another charger I had lying around. After 8 hrs off the charger, I had dropped from 100% to 99% (awesome). I then made a phone call this morning for 6m and used the display for 15m and it dropped to 94%. I then left it in my pocket for another hour and it dropped to 90%. I don't get it! :-(
Two separate issues here:
hah2110 said:
Do you only use the HTC charger that came with your phone? MicroUSB is MicroUSB and it will charge from any charger BUT I have heard that different milliamp chargers can cause undesired effects in the battery (of any phone) such as decreased lifespan or less battery life in the short term. Any truth to this?
Click to expand...
Click to collapse
The official HTC charger is 5V 1A. Some other chargers, such as car lighter chargers and USB ports only give out 0.5A, so charging takes much, much longer. In fact, if you use a 5V 0.5A charger whilst continuously using the phone for something battery-intensive like sat-nav, the charge will still drop, but not as fast as if it were not charging at all. You'll get a warning on the phone something along the lines of "the charger is not sufficient to charge the phone and use it at the same time" (can't remember the exact wording). make sure you use 5V 1A.
hah2110 said:
Only reason I ask is because A) I'm curious and B) I got my Sensation yesterday, charged it with the stock charger at work but left it by mistake. When I got home, I charged it with another charger I had lying around. After 8 hrs off the charger, I had dropped from 100% to 99% (awesome). I then made a phone call this morning for 6m and used the display for 15m and it dropped to 94%. I then left it in my pocket for another hour and it dropped to 90%. I don't get it! :-(
Click to expand...
Click to collapse
There are a few threads discussing this already.
sjgore said:
Two separate issues here:
The official HTC charger is 5V 1A. Some other chargers, such as car lighter chargers and USB ports only give out 0.5A, so charging takes much, much longer. In fact, if you use a 5V 0.5A charger whilst continuously using the phone for something battery-intensive like sat-nav, the charge will still drop, but not as fast as if it were not charging at all. You'll get a warning on the phone something along the lines of "the charger is not sufficient to charge the phone and use it at the same time" (can't remember the exact wording). make sure you use 5V 1A.
Click to expand...
Click to collapse
This much I know. But they aren't all 1a. My old Defy charger was like .8 and this is 1a. I'm not referring to charge times. I pointed out your GPS point to an OP in another thread. I'm referring to if using a different MA charger effects the quality of the battery or how long it can run on a charge.
There are a few threads discussing this already.
Click to expand...
Click to collapse
Conclusions?
How many amps can one charge at?
I see car charger product that claim to output at 1a, 2.1a, even 5a.
Then I see that it may not matter what the output of the device is: that unless the cable you use to charge shorts the center two pins together, you will only get .5a.
Bump.......
I've always understood that a "trickle charge" or a slower charge is better. I only charge via usb for this reason. It takes much longer to charge, but supposedly it charges the battery in a better way and it will discharge slower.
Any truth to the battery conditioning tips I've seen about letting the battery charge and drain 3 times completely when new? I have read that these lithium batteries dont require that but I keep seeing conflicting info.
GorillaPimp said:
Any truth to the battery conditioning tips I've seen about letting the battery charge and drain 3 times completely when new? I have read that these lithium batteries dont require that but I keep seeing conflicting info.
Click to expand...
Click to collapse
In addition to that, I'm curious on how you all charged your phone the first time. I want to make sure that I do it right when I get my Sensation.
So where are these battery drain threads?
kevin2sick said:
In addition to that, I'm curious on how you all charged your phone the first time. I want to make sure that I do it right when I get my Sensation.
Click to expand...
Click to collapse
I used the wall charger initially but then switched to USB which actually seemed to work faster. I used my N1 charger earlier.
Anyone going to advise on battery drain? Losing 4-5%/hr idle. No, it isn't an app.
Bump.......
hah2110 said:
Anyone going to advise on battery drain? Losing 4-5%/hr idle. No, it isn't an app.
Click to expand...
Click to collapse
How did you verify what's draining it?
GorillaPimp said:
How did you verify what's draining it?
Click to expand...
Click to collapse
HuH????????
hah2110 said:
HuH????????
Click to expand...
Click to collapse
How can you be so sure that it's not a rogue app?
I get a drain of about 2% an hour. That's with wi-fi on, google syncing, and twitter and facebook updating every hour.
sjgore said:
How can you be so sure that it's not a rogue app?
I get a drain of about 2% an hour. That's with wi-fi on, google syncing, and twitter and facebook updating every hour.
Click to expand...
Click to collapse
Because I had no apps installed that would do that, there is nothing in battery use, etc. 2%/hour is high for the sensation.
hah2110 said:
Because I had no apps installed that would do that, there is nothing in battery use, etc. 2%/hour is high for the sensation.
Click to expand...
Click to collapse
There are apps and processes that are part of the system that can drain power like that. Having a bad signal and constantly dropping connections can run down your battery. Did you pick up watchdog for free on amazon yesterday? That can tell you more about what is using the cpu.
hah2110 said:
Because I had no apps installed that would do that
Click to expand...
Click to collapse
Well that's okay then. I was stupid enough to think you might have used something such as System Panel or Current Widget from the Market to actually verify the battery drain and the tasks/apps that were responsible.
hah2110 said:
2%/hour is high for the sensation.
Click to expand...
Click to collapse
High? My HTC Desire drained 1.75% per hour with CM7, so 2% for a dual-core phone running HTC Sense is pretty impressive, IMHO.
sjgore said:
Well that's okay then. I was stupid enough to think you might have used something such as System Panel or Current Widget from the Market to actually verify the battery drain and the tasks/apps that were responsible.
Click to expand...
Click to collapse
I could do that, but they generally don't report too much.
High? My HTC Desire drained 1.75% per hour with CM7, so 2% for a dual-core phone running HTC Sense is pretty impressive, IMHO.
Click to expand...
Click to collapse
If you read up on the reviews, you will see that the Sensation has achieved <1%/hr drain with items syncing.
Im really anal and I dont open my phones accessories if I dont have to lol. I have been using a spare MT4G charger and its working fine. It is rated at 1 Amp like the factory Sensation charger is though.
For those wondering, as slow as these batteries discharge you will probably not see any gains in performance when you trickle charge a battery (for example over USB) over using the stock charger. It is recommended you fully charge the battery and fully discharge it the first time you use it. The battery life will get better after a couple cycles, yes they need to be "broken in". Like all rechargeable batteries they will degrade over time, it is inevitable. Since OEM batteries are so cheap these days I personally dont go too far out of my way to "properly" charge and discharge my battery. It will die when it dies, at that time I will just buy a new battery.
Hi everyone,
I've had my Sensation for about 14 months now and for the past month I've been having battery issues. Primarily, it's very quick to lose charge and will lose charge even while charging from the wall. First I bought a replacement battery but was still having the same issues. I've started using Better Battery Stats and Battery Monitor Widget but I don't have anything out of the ordinary running. In fact, not a lot is running at all. BMW has allowed me to see how the charging is going though which has been nice. During this period I have used Elegancia, Bruce's CM10, and am currently on ParanoidAndroid. All experienced the same issues.
Last night, for example, I put the phone on the charger at 16 percent. It charged up to 22 and then started the downward slide to death and I ended up waking up 35 minutes late.
Where do I go from here so I don't have to constantly be paranoid about my battery levels?
Sounds like you might need another battery. In better battery starts did you notice any unusual wake locks? This could drain a battery. But since it looses charge even when charging I'd think it was the battery. I personally was experiencing some battery issues myself finally I broke down and got a mugen 3800mah battery from mugen. It was expensive but really worth it for Me.with really heavy and constant use I get 20 hours out of my battery, with normal use I get two days. I'm also running paranoid Android rom. For me the big battery solved my issues. Only one draw back, it does make your phone thicker. New back included with battery. This didn't bother me much because of the excellent battery life I receive. Now I finally don't. Worry about battery. However it's expensive at about 95 dollars. But I was so fed up with poor battery life it was worth it for me. You have to be careful when buying inexpensive batteries because there are a lot of fakes going around. And the mah is not really what it says it is on the packages. You can test the battery and make sure it is what it's advertised to be. If you don't want to go with that large of a battery you can also try anker extended battery. It's a lot less expensive and is a good battery. I personally needed more juice so I went with the big battery. I know you said you replaced the battery but sometimes the bargain batteries go bad quickly. It makes me suspicious of the battery because it's even dropping while charging. This is strange. If you ruled out any apps or wake locks that might be draining the battery I would buy a good reliable battery. The draining while charging is a red flag. I'd say the battery is going bad. I don't at all regret my purchase of the big battery. It for me, solved my issues. I do Hope this helps and I wish you the best. Hopefully you will get your issue resolved soon.
Sent from my HTC Sensation using xda premium
its either an issue with the battery or the battery reporting.
Only thing you can really try is to charge it up to 100%, wipe battery stats in recovery, then let it empty totally and charge it up again, see how its behaving. There is a chance that its the reporting that is off.
otherwise this looks like the battery is on its way out im afraid
realsis said:
Sounds like you might need another battery. In better battery starts did you notice any unusual wake locks? This could drain a battery. But since it looses charge even when charging I'd think it was the battery. I personally was experiencing some battery issues myself finally I broke down and got a mugen 3800mah battery from mugen. It was expensive but really worth it for Me.with really heavy and constant use I get 20 hours out of my battery, with normal use I get two days. I'm also running paranoid Android rom. For me the big battery solved my issues. Only one draw back, it does make your phone thicker. New back included with battery. This didn't bother me much because of the excellent battery life I receive. Now I finally don't. Worry about battery. However it's expensive at about 95 dollars. But I was so fed up with poor battery life it was worth it for me. You have to be careful when buying inexpensive batteries because there are a lot of fakes going around. And the mah is not really what it says it is on the packages. You can test the battery and make sure it is what it's advertised to be. If you don't want to go with that large of a battery you can also try anker extended battery. It's a lot less expensive and is a good battery. I personally needed more juice so I went with the big battery. I know you said you replaced the battery but sometimes the bargain batteries go bad quickly. It makes me suspicious of the battery because it's even dropping while charging. This is strange. If you ruled out any apps or wake locks that might be draining the battery I would buy a good reliable battery. The draining while charging is a red flag. I'd say the battery is going bad. I don't at all regret my purchase of the big battery. It for me, solved my issues. I do Hope this helps and I wish you the best. Hopefully you will get your issue resolved soon.
Sent from my HTC Sensation using xda premium
Click to expand...
Click to collapse
Argh. I hope it's not the replacement battery too. I got a replacement HTC battery. The problem I'm having getting anything useful from Better Battery Stats is that rarely am I off the charger. In the settings it says I can log while charging but it may mess up the stats so I've shied away from doing that. I'm not against getting a bigger, better battery but I would hate to do that and have it actually be something else hardware-wise where I would need to get rid of my phone.
Hawke84 said:
its either an issue with the battery or the battery reporting.
Only thing you can really try is to charge it up to 100%, wipe battery stats in recovery, then let it empty totally and charge it up again, see how its behaving. There is a chance that its the reporting that is off.
otherwise this looks like the battery is on its way out im afraid
Click to expand...
Click to collapse
I'll give this a try if I can get it back up to 100%. Is the reporting in Recovery always correct? The battery never has issues charging while it's in Recovery mode. If that's the case then I'll charge it to 100% in recovery and then wipe and start fresh.
Thanks
I don't think it's the battery. This phones have errors in battery readings. I feel your pain man. Mine is from T-Mobile (Sensation 4G) and it discharges if I use it even at lowest brightness when it's charging too.
If I reboot, I get the battery boost. I have tried EVERYTHING I read here and nothing worked. I even have 4 batteries. All of them in good condition.
I even tried three times discharging it fully and without turning it on, charge it in the night and when I wake up 7-8 hours later, it's still charging. I tried wiping stats, changing ROMs, changing the usb cable and the charger. Everything... I believe it's a hardware issue. (Thank HTC for that) I'm not buying another HTC when I have to upgrade.
KerberosKomondor said:
I'll give this a try if I can get it back up to 100%. Is the reporting in Recovery always correct? The battery never has issues charging while it's in Recovery mode. If that's the case then I'll charge it to 100% in recovery and then wipe and start fresh.
Click to expand...
Click to collapse
Interesting...so if you were to charge the phone in recoery how long do you think it would take to get to 100%?
I would definitely do what you said, charge in recovery then wipe battery stats and go from there.
If you're interested in having something to compare to, it takes my phone about 3 hours to charge to 100% (by the way I'm using an Anker extended capacity battery), with a peak current usually around 800 - 900 mA. Fully charged I have somewhere around 4100 mV. If you haven't already, I'd suggest adding a Battery Monitor widget with mA, mV, and % available being displayed and it will be pretty easy to get an idea what's going on.
KCuadrado said:
I don't think it's the battery. This phones have errors in battery readings. I feel your pain man. Mine is from T-Mobile (Sensation 4G) and it discharges if I use it even at lowest brightness when it's charging too.
If I reboot, I get the battery boost. I have tried EVERYTHING I read here and nothing worked. I even have 4 batteries. All of them in good condition.
I even tried three times discharging it fully and without turning it on, charge it in the night and when I wake up 7-8 hours later, it's still charging. I tried wiping stats, changing ROMs, changing the usb cable and the charger. Everything... I believe it's a hardware issue. (Thank HTC for that) I'm not buying another HTC when I have to upgrade.
Click to expand...
Click to collapse
I'm leaning towards hardware issue too. That's why I figured I'd post and see if there was anything else that I can try. It's also why I don't really want to buy an expensive battery since who knows what it'll fit next. I know what you mean about the reboot battery boost. You can almost gamble and bet on percentages when you reboot. I've seen 50% swings before.
goatee84 said:
Interesting...so if you were to charge the phone in recoery how long do you think it would take to get to 100%?
I would definitely do what you said, charge in recovery then wipe battery stats and go from there.
If you're interested in having something to compare to, it takes my phone about 3 hours to charge to 100% (by the way I'm using an Anker extended capacity battery), with a peak current usually around 800 - 900 mA. Fully charged I have somewhere around 4100 mV. If you haven't already, I'd suggest adding a Battery Monitor widget with mA, mV, and % available being displayed and it will be pretty easy to get an idea what's going on.
Click to expand...
Click to collapse
In recovery I would guess that it wont take very long to charge to full. I have battery monitor widget installed and while plugged into the wall with my 1.0A charger, it will typically pull 100-200mA but sometimes it'll spike to 700-900mA. No rhyme or reason. When idling and functioning properly, without a charger plugged in it drops 9-100mA. Sometimes though while charging it'll sit at negative 100-200mA.
HA! Just rebooted my phone and it went from 68% to 100%. So I rebooted into recovery, it also said full so I wiped stats.
KerberosKomondor said:
In recovery I would guess that it wont take very long to charge to full. I have battery monitor widget installed and while plugged into the wall with my 1.0A charger, it will typically pull 100-200mA but sometimes it'll spike to 700-900mA. No rhyme or reason. When idling and functioning properly, without a charger plugged in it drops 9-100mA. Sometimes though while charging it'll sit at negative 100-200mA.
Click to expand...
Click to collapse
I normally get 2 to 3 mA drain with the phone sleeping. When charging you may not necessarily get close to the 1 A current delivery of the charger straight away, typically it will ramp up over time and reach peak charge current as it gets closer to 100%. Once at 100% it wants to just "trickle" charge to maintain 100% charge until the charger is disconnected, so any wakelocks etc. that cause a current drain during that "trickle" charging will actually decrease battery charge until the charger ramps up to compensate for the drain. Random spikes in charging current would suggest a hardware problem where the electronics are struggling to properly govern the charging process, as would a large negative current drain with the charger plugged in. Silly question but what's the actual plug connection to your phone like? Nice and solid, pins all OK?