Q: Any Problems with chargers with too high or low a capacity

types but many people just grab the nearest one.

too low or too high amp capacity for the item being charged.

this camera with one rated .5 or .3Ahr. Seems to me this could damage the charger and\or not fully charge the camera. Yes? No?

with a .3Ahr charger. Would this item only draw what it needed (not using the full capacity of the charger) or might it be damaged or overcharged by the charger?

You have it, the devices only draw what current they require. If the power pack can't supply enough the average one becomes toast if it's not protected.

R.P

Good answer. Since this is s.e.*basics*, I'd like to add just one thing - Chargers are rated in A or mA - the maximum amount of current they can supply without overheating, shutting down or blowing up. Batteries are rated in Ahr or just Ah, the product of current and time.

If a battery is rated for 0.5Ahr, it can supply 0.5A for 1 hr, 0.25A for 2 hrs, 0.1A for 5 hrs and so on, at least in theory. It's a little different in practice.