Factory also admitted that the battery level at their end also stops at 88%..and they checking with processor cum main board market if this can be solved.
Then i go google android market and found "battery calibration" tools but dam i do not have root permission (in windows means administrator right)
For more info can refer to here
https://market.android.com/details?id=com.nema.batterycalibration&feature=search_result
Hi,
Great to see another borther jumping into the bandwagon of china pads. The battery calibration basically just deletes the file. Try to explain to you. I have tried this so called battery re-calibration method. My battery also shows the battery max out at 80 to 90%. It will never reach full. Better yet, I plug in the charger, show 80% to 90%, pull it out, immediately drop to 70%.
I have tried the battery calibration method. This method was suggested by many other people playing with their pads with different results.
Android has a battery charging file which it uses for a reference. When the pad was made, the pad recognises the battery as 0% then when the battery circuit board cuts the power after full charge, the Android OS will capture a certain reading or state of the battery as fully charged. This is a reference point which it will then reflect on the battery meter as 50% or 70% or 100%.
Overtime, Android will pick up more data whenever you charge the battery. It is like a mini database. Problem arises over time as well as we never use the battery till 0% before charging. So the data becomes a little off. You tend to charge say at 50% or at 40%. This figure is just a speculation by the OS given the voltage reading from the battery. Thus, there is a common problem that people tend to complain that over some time, the battery drops very fast or depletes faster after some usage. This could be the OS not charging the battery completely or thinking it is fully charged when it is not.
Now, back to the pad. The battery calibration method is to have user root access and to delete the battery calibration file when your pad is almost completely flat out of battery. Thus, this is to "return" the battery condition back to factory and when you fully charge it over 10 hours, Android will capture the new battery information and recreate the battery file as a first charge basis.
Most importantly, Does It Work? ...Yes and No. I tried it, slight imrpovement. The battery meter did not drop so drastically but still canot reach 100%. Some people commented that it completely solved their problems after doing it a couple of times. So, this is a method cooked up by somebody trying to tweak their pad. It is one of the possible solution but not THE solution.
Frankly speaking, I still think it is the crappy battery with the crappy crcuit board that is controlling the battery giving problems. That is the main reason why I opened my pad and tried to replace the battery. Now I stuck. Battery cost about $48.00 with the need to repalce another charge costing $35.00. Total cost $83.00. Now thinking is it worth it? Maybe I will try to buy another pad when I next visit HK. Not sure what to do. The only good thing about buying the pad is I learnt alot about Android 2.2 in the process.
I think you should just forget about the battery recalibration method. If you really want to try it, you need to root the pad. No other way. In theory, the method is sound and logical. However, reality often is not.
Thus, as per my original post, if you are happy using your very cheap pad, just leave it. The next person who bought a $800 pad will be better then yours but trust me, you can update and change every 6 months and by the 2nd pad you buy, it would be better then his 1 year old $800 pad.
By the time, you are bored with your pad, start rooting and you will find it gives a new lease of life.