Found the problem in Infuse 4g battery fast draining
I found the problem even when charging the phone takes too long,
The real problem was 4g always on, this suck battery so darn fast.
So to charge the phone you need to turn off the 4g but of course you wont received any email and so, unless you are on wifi, heres how to do it easy just press and hold power button then deactivate "data network mode" and I even tried watching.movies on my memory card with the 4g off made hug, not tiny bit, but huge difference. Now we need to look for an App that will turn off 4g and only use 3g connection, as deactivating data network mode turn off data entirely including e edge. I'm going to call samsung 1800 samsung