When I get it, I should plug it into the wall and charge it 100% before even turning it on. Let it drop to about 15% then power it off and charge it till about 100% again. Short charges are better than leaving it on the charger over night. Charging while turned off is better than while turned on. Charging it through the wall is no harder on the battery than charging through the computer. I don't know if this one is the right area or not, but are Thunderbolt batteries compatible with the Rezound? My dad has a t-bolt, with an extra battery and may be upgrading soon, that's why I wondered.