I completely disagree with this method of attempting to "build or restore more power into a Li-Ion battery ". There is NO WAY to SAFELY increase the capacity of a Lithium Ion Polymer battery (the type in these phones), and anyone who has used "bump charging" to do so is either simply benefiting from a placebo effect or is pushing the battery beyond its design specifications.
This method of attempting to bypass the built-in battery charging and monitoring system is potentially dangerous as well. It is true that you can charge the battery to higher voltage levels than are recommended by the manufacturer, and that the battery WILL then last longer during use, but by charging in excess of the battery's recommended maximum voltage levels you are DECREASING the LIFESPAN of the battery, such that it will age FAR FASTER than normal. ALL Lithium Ion batteries leave the factory being able to "SAFELY" hold only so much voltage and current. Any attempts to exceed these rated values is detrimental to the battery and can also cause what is known as "thermal runaway" which can ultimately result in a battery that bursts, and expels flames and noxious gasses, potentially resulting in a fire and harm to person.
The battery charging system is designed to watch increasing voltages and decreasing current draws to identify when the battery is nearing its fully charged levels (about 90%). Once it does that, the charger then steps down the rate of charge for the last 10% of charging until it sees the current draw reach 3% of rated capacity at which time it shuts off charging altogether to protect the battery from overcharging and thermal runaway. By "bump charging" what you are doing is allowing the battery's voltages and current to balance out and stabilize at a lower voltage level (which is a natural effect), but then forcing more voltage and current into the battery above what it is rated at. This is VERY DANGEROUS.
Nobody should be coming to the conclusion that their battery is working improperly until they have FIRST done a complete charge and training cycle with the phone. This is a 3 step process and unless you do all three steps properly and one right after the other, you can not depend on the readings of the meter to indicate a true battery level. Case in point...
http://www.droidforums.net/forum/droid-razr-support/206890-battery-issue-not.html is a thread about a guy who's phone continued to operate for 7 hours while the meter displayed 5% the entire time. THIS is a perfect example of why the meter can't be trusted until it has been "trained" to the battery.
- The PROPER way to assure a FULL CHARGE to the battery's TRUE CAPACITY (and to "train" the charging and metering system), is to power the phone off FIRST!
- Then plug the STOCK CHARGER into the phone, and allow it to boot into the Charge only mode. Allow it to charge to 100% as indicated by the animated battery and % indicated. To check, briefly tap the power button ONCE and wait 3-4 seconds for the charge indicator to display. If it has still not reached 100%, LEAVE IT ALONE for another 30-60 minutes and check again. The entire time needed to reach 100% is anywhere from 1-3 hours for a RAZR (depending on what level you start your power-off charge from), and 2-5 hours for the MAXX. Once it has reached 100%, you should disconnect the charger, power the phone on and use the phone as normal.
Note: This is also something you can do anytime you want to assure maximum battery level if you are going to be away from a power source for an extended period of time and need the maximum staying power.
- CONTINUE using the phone while monitoring the battery level and don't sweat the numbers if they appear to be falling fast, slow, or not at all for any time during this discharge process. What you DO want to do is once the meter signals the "Low battery" warning at 15%, to again POWER OFF the phone and repeat step 2.
After performing this training, the meter will know the proper maximum battery capacity, the minimum levels at which point to signal the charging requirement, and the approximate levels across the range of discharge during use.
I have posted countless explanations of this method and there have been countless confirmation by users who have done this to prove it works. Also I have posted links to third party references which both prove my claims and back them with clinical and scientific evidence and explanation of same. ANY attempts to bypass or otherwise circumvent/fool/bump/trick the charging system into charging the battery beyond specs can result in catastrophic damage and potential loss of house, limb, or life. Do so at your own risk but I highly recommend you DO NOT recommend such to others - especially when you have no understanding of the dangers and potential consequences.