> It certainly heated them up
NiMH shouldn't get to hot when charging, it generally means that they're
being overcharged.
>The bloke in Jaycar said that NiMH give a peak positive when fully charged
>and Ni-Cad
>a negative dip when fully charged which is why Ni-Cad chargers can cook NiMH
"the bloke" has got his facts wrong :)
>Peak detect chargers work by detecting the "peak voltage" (when the cell
>are fully charged)
at this point the energy being supplied to the cells is being converted to
heat, which in turn will damage the cells.
If the current supplied is to high the cell will vent and in some cases
will explode.
The peak detect voltages for NiMH & NiCD"S is different 3mA/cell
& 10mA/cell, some of these so called smart chargers are not smart enough
to detect these smaller voltages, and in some cases are accidents waiting
to happen. Most NiMH cell packs used in mobile phones etc have overcharge
protection, charging loose cells or unprotected packs is a little more dicey,
If you want to look after your cells buy a good peak detect charger,
they're a little more expensive but well worth the money.
NiMH can loose up to 3% capacity per day, especially when the weather is
hot, so they should be cycled and charged every month or so to avoid loss
of capacity.
Serious users of rechargeable cells store them in the refrigerator in summer.
Regards Russ
--
* You are subscribed to the aus-soaring mailing list.
* To Unsubscribe: send email to [EMAIL PROTECTED]
* with "unsubscribe aus-soaring" in the body of the message
* or with "help" in the body of the message for more information.
