There is really nothing special about the maintenance of the BP511 batteries. You should always fully charge the BP511 batteries before first use. If using the Canon charger, keep in mind that a full charge is not when the red charge light goes solid, but about 1 hour after than. See page 19 of the manual. Unlike older types of rechargables, these do not have a memory, but they do have a lifetime measured in number of full charges they will hold. Also keep in mind that when not in use they slowly lose their charge, so if they've been sitting around for several months, its always wise to put them back in the charger. Also keep in mind that the aftermarket BP511 batteries that you can buy for about $12 each are every bit as good as the Canon brand at $50 + per battery (at least that's been my experience using the ones from SterlingTech). I usually always carry 5 batteries with me when I go anywhere. Under average usage you can shoot from 200-400 shots per battery. I don't use the grip simply because it just makes the camera heavier and gives very little advantage. It only takes a few seconds to switch batteries. Also many of the grips have had problems, so keep that in mind.