contemplating buying one of these extended battery, i read a few of the posts in this thread. so to be clear, getting the maximum charge out of your battery, you charge it for 8 hours once you get it, then let it go completely dead and recharge it fully? if someone could clear up the specifics of these or explain battery conditioning in more detail, i'd be grateful.
There is no reason you ever need to let it go completely dead just for the batteries sake, but only if you are trying to test it.
Its actually better for the battery over a long period to extend life to "not" deplete it all the way.
The only reason some of us are doing that "temporarily" is because we are trialing an new app called "battery left" that watches and measures the use of the battery against time to make an accurate future estimation of how many more hours of battery life you have.
The app needs to see the battery in action from start to finish to get properly calibrated. From that point it gets pretty accurate and normal use works ok.
There is a firmware glitch in the Droid that causes it to miscalculate the correct battery percentage left with extended batteries.
Hopefully that will be corrected with the next firmware update of 2.1 scheduled soon to be released.
Some us have learned the millivolt readings and use that as a good gestimate too.
All in all, when you charge your battery, you can't really go by the percentage meter to tell you its at 100% because the battery continues to charge even though its reached a voltage that makes the meter think its fully charged.
We have determined you need to let it get to 4200mv before you can trust it.
But with the brand new extended battery,
Seidio is recommending an 8 hour initial charge before you can expect full use.... in fact they say it takes several cycles to break the battery in before you can trust full capacity will be achieved.
Even straight out of the box with one charge, it totally beats the stock battery anyway.
I expect the need for a good soaking charge is to equalize all the cells as they may have settled over time sitting on the shelf and this gets the weaker cells even with the stronger cells.
The battery has protection built in to prevent overcharging anyway.
I basically charge it when I sleep and when I'm awake, its awake!
My last depletion took 36 hours with nominal use for me... for others that use more heavily that will be less.. and some maybe more.