How long do I have to charge my BP511A battery in order to be full? When I charge for long hours like 8, it only show me left one bar on the camera. So I thought my battery is dying. So I bought another original new one, after charging and use the first time, it show full bar on the camera but the 2nd time when I charge and put into my camera, it show one bar again. Ok, I went to buy a 3rd party and charge for the first time and it show full bar on the camera. Now it's my 2nd time to use this 3rd party battery and when I insert the battery to my camera, it show one bar again. Is my charger at fault or my camera at fault?
I'm using Canon 20D.