it is suppose to charge the batteries in 15 hours or less. The charger has a light that goes off when it's done charging, but after 18 hours the light was still on so I took out the batteries. I only used them in my camera for a few pictures and now they need to be charge again. Should I have left them in the charger until the light went off? I don't want to over charge, cause I don't think that is good for them.
2007-12-14 11:51:34 · 1 answers · asked by greywolf_222 3 in Consumer Electronics ➔ Other - Electronics
the batteries are 2500 MAH NI-MH and brand new.
2007-12-14 12:28:10 · update #1
A battery charger should have a limit circuit that will slow the charge down to a trickle once the batteries reach a certain voltage. So, don't worry about over-charging them.
What kind of batteries are they, Ni-Cd or Ni-Mh? Are they new or used?
If they're used Ni-Cd or Ni-Mh batteries, you will have to put them through a deep discharge cycle to get them back to their original charge capacity. Completely discharge the batteries (put them in a device and leave it on until it goes dead). Then charge the batteries for as long as they take. Put them back into the device and completely discharge them again. Then charge them again. The charge time should decrease and the battery charge should last longer.
Either way, you shouldn't short discharge or charge rechargeable batteries (except for lithium ion batteries - they don't have a short discharge "memory" like Ni-Cd and Ni-Mh batteries do). Let them completely discharge before recharging them. If necessary, keep an extra set of charged batteries handy for when the device finally dies from dead batteries. Then charge them fully before using them again.
2007-12-14 12:17:00 · answer #1 · answered by Paul in San Diego 7 · 1⤊ 0⤋