Originally Posted by dedfish
Everything you wanted to know about the care of lipo batteries:
Short answer: leaving a battery at full charge for an extended amount of time is not good for the battery.
Edit: Also from what I understand the best way to monitor the condition of your batteries is measuring the Internal Resistance (IR) of the battery. Better chargers can do this. Mine does and I write down the IR of each battery on the battery the day I get them and I will now check that to determine how my batteries are doing.
The way I do it is just buy a new battery each month and toss the old one in the trash .I am not that good with math so its easyer for me to handle the battery problems this way.