HTC Legend battery overheating- I'm lost trying things

[Guest bitterbierce]

Hello to everyone,

I'm a newbie to android phones and very pleased about the system (if I can finally get it to work).

I got my phone from Vodaphone Spain in late July. Everything was going fine until the second half of August, when my battry life suddendly dropped dramatically and I have not been able to get it back up again. I tried using several juice managers, new batteries, different charging options, charging with phone switched off/on etc. Last Sunday I managed to downgrade and add a MoDaCo ROM as described in the forum tutorial. All to no effect. If it were not for the very happy first month, you would have probably ended up watching me in YouTube "Osterizing" (blending) the damm little brick.

This morning I couldn't fin the 1lb ball hammer, reconsidered the energetic action after breakfast and decided to try to fix it or return it to the operator.

Can anyone give me a suggestion as to where and what to do?

Mi current bootloader is HBOOT 0.43.001

Radio -07.05.35.26L

Thanks in advance for your precious time.

Cheers

Edited September 15, 2010 by bitterbierce

[Guest awarner]

Have you tried a new battery? as it sounds like the battery has failed for some reason.

Also how long is the battery life?

Finally how have you been charging the battery when you first had it? With Li-on family of batteries you need to keep them topped up rather than the old Ni-cd where you had to discharge them. If you have been trying to discharge the battery before charging this will damage it but to properly discharge can be difficult as they have inbuilt undervoltage protectino built into decent batteries.

Just a thought have you tried a good 12hrs condition charge? this can help improve and condition the battery and is worth doing once in a while.

You have actually posted this in the Windows section of the site rather than the Android, takes a bit of moving but I'l, pop it in the right section for you.

[Guest bitterbierce]

Have you tried a new battery? as it sounds like the battery has failed for some reason.

Also how long is the battery life?

Finally how have you been charging the battery when you first had it? With Li-on family of batteries you need to keep them topped up rather than the old Ni-cd where you had to discharge them. If you have been trying to discharge the battery before charging this will damage it but to properly discharge can be difficult as they have inbuilt undervoltage protectino built into decent batteries.

Just a thought have you tried a good 12hrs condition charge? this can help improve and condition the battery and is worth doing once in a while.

You have actually posted this in the Windows section of the site rather than the Android, takes a bit of moving but I'l, pop it in the right section for you.

Sorry about the mishap/error,

My problems really started after a recommended HTC or Android software upgrade and, although I have reverted the change thanks to this forum's advice, my phone has not been the same again. It may be possible that the overheating has damaged something inside, like a temperature sensor, and needs recalibrating.

After resetting the phone to earlier specifications, I tried a new fully charged battery, charged using the phone charger with the phone turned off, but it discharged just like the original battery. One thing I have found while using the phone in 3G, whether it is charging (worse condition) or not, is that the battery monitor detects overheating (in excess of 48.7º C) .

Another thing that called my attention is that the battery monitor application did not reflect temperature changes fast. I tried to cool the phone unit resting the back of the phone on top a cool pack to lower the temperature down to 8ºC. The change in temperature was monitored more than half an hour later, after it was stable at 8ºC.

My conclusion is that the battery overheating problem is the same in both original and replacement batteries. It is a battery management problem.

If a regular user can not fully drain a Li-ion battery equipped with undervoltage protection then it is useless. NiCd NiMH and specially Lithium Polymer all have the similar undervoltage problems. In my quest for a higher capacity battery I found a LiPo replacement that I inmediately discarded because of the charging requirements, higher explosion and metalic fire hazzard (I have seen too many LiPo fires in RC modelling). Beware of LiPos!

Another fault is that the USB cable does not supply enough current to the charger when used with an original HTC car lighter adaptor. There would be some reason or explanation if the problem is that the charging current is too high and the heat dissipation needs are not met by a plastic car cigarette lighter housing.

I will be receiving a new battery and desktop charger in the following days but I don't think it will work.I have discussed the problem with HTC Desire users and beeing a very similar phone with a bigger screen and less heat dissipation characteristics they have not reported the same problem. We'll see.

Edited September 17, 2010 by bitterbierce

[Guest bitterbierce]

I got a new original battery. The working battery temperature when using 3G is 54.3ºC which is way too hoot for a healthy battery. Battery life is less than three hours under ordinary gsm and 45' using 3G.

[Guest awarner]

If a regular user can not fully drain a Li-ion battery equipped with undervoltage protection then it is useless.

No that is the point you never drain a Li-ion battery as you will damage it's capacitance and once this happens then the batter will never be the same.

Li-po are more expensive but can be better than Li-ion the advantage with polymer is that it can be shaped into a non uniformed sized which you can find with newer devices.

As for the battery overheating are you keping WiFi/GPS etc turned on? these are renown for making the battery run hot and drain the battery so you may unknowingly have one of these processes enabled.