nickle metal hydride battery charge ?

i am using a 12v 200mamp battery charger to charge 2 aa nickle metal hydride batteries in series

any particular reson why charger should get really hot to touch and the batteries rather warm?

the battery charger is a charger used to charge wireless phone

i am assuming the batteries are absorbing large amounts of current and probably acting just as a short across the charger

takes about 4 hours for things to get really warm

amy comments really appreciated

i am not an electrical engineer tia

Reply to
ilaboo
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Assuming

  1. Your charger delivers nom. current (200mA) until the overcharge limit is reached.
  2. The two AA batteries are in series. A simplified power calculation indicates that when your are charging the two AA in series the circuit dissipates ~ 2 W. To this, one has to add the power dissipated by the AC to DC conversion and the rest of the electronic, perhaps in total ~ 3 W. That could make the charger quite hot. In any case, if the charger has a plastic cover, keep it open while charging. Gene
Reply to
Gene

does the charger state it will do nickle metal hydride batterys or is it designed for nicads only?

Ben

Reply to
ben

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