I have batterybooster on my phone and supposedly it increases battery life but I was wondering if this is actually true or just a gimmick? Has anyone tried it? I have a 8800 and I talked on the phone last night for exactly 3 hours, full volume and the battery went from 100% to 60% so meaning I could of talked for at least another 5 hours or so.

It works good for me. I got mine from the crackberry store and also wrote a positive review about it. It seems there are people the app doesn't work for, or they never tried it, don't believe in it and bashed it straight away.

Anyway, I am happy with it

P.S.: I just found it in another shop for cheaper and with 30 day money back guarantee. So it might be a no-risk trial, kind a: BatteryBooster