on wednesday i popped this bad boy in my gamepad
The battery comes with a little bit of charge in it, but a full charge will take you 4H. In comparison the original battery takes 2H 30M to charge it.
Now battery life, the original will get you 3H 10M of play time(on factory settings i.e. brightness 4, powersave off), this new battery will get you 6H and 15M of playtime.
All in all im verry happy with the improvement.