cctalk Digest, Vol 12, Issue 5

Marc Verdiell marc.verdiell at
Thu Jun 25 06:56:09 CDT 2015

Good info David. Thanks once more.


"J. David Bryan" <jdbryan at> said:
Subject: Re: HP 2113e Battery resistor
>I might put NiMH batteries instead....
That may not be advisable, given the continuous constant-current trickle
charger in the CPU power supply.  The Panasonic "Nickel Metal Hydride
Technical Handbook" recommends charging for no more than 10-20 hours,
  "The overcharging of nickel-metal hydride batteries, even by trickle
   charging, causes a deterioration in the characteristics of the
   batteries.  To prevent overcharging by trickle charging or any other
   charging method, the provision of a timer to regulate the total
   charging time is recommended."
Panasonic's "Nickel Cadmium Batteries Technical Handbook," on the other
hand, says explicitly that continuous trickle charging for Ni-Cds is a
recommended charging method.
                                      -- Dave

More information about the cctalk mailing list