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

Discussion in 'Electronic Basics' started by [email protected], Jan 29, 2013.

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  1. Guest

    I'm very happy that more and more wall chargers are the 5 VDC micro or mini types but many people just grab the nearest one.

    My questions are what problems, if any, exist in using a charger that has a too low or too high amp capacity for the item being charged.

    Question 1: Say my camera came with a charger rated .7Ahr and I try to charge 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?

    Question 2: I use the above .7Ahr charger to charge something small that came 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?

    Seems like information everyone should be aware of.
    Thanks for any answers.
  2. Pimpom

    Pimpom Guest

    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.
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