On Sun, 5 Jul 2009 09:23:00 -0600, "SteveB"
wrote:


wrote in message
.. .

Some manufacturers warn that slow charging will damage NimH by
overcharging.

If left hooked up permanently as most people do then yes, any charger
can harm the battery.

vs: if it's hooked up to a charger and left for days, but only turned on and
off for eight hours a day?

No. Specifically 1.4 volts at 130ma X 2 hours a day = 8 days to charge

At maximum( it will be much, much less) 2/10ths of a watt of heat
can be generated. A battery hooked to this for two hours can easily
dissipate any heat or withstand any other devastation that such a puny
charge system can throw at it.