I use this battery pack to charge my droid phone and sometimes my ipod. With this battery I am confident I will have enough battery for the entire day- even with constant internet use. Best part is I can still use my phone while it is charging. I've also found that my droid phone only charges when the screen is on (if i am using it) and it is attached to this battery. I find this to be OK b/c the trent battery seems to turn off automatically if its not charging anything.