Subj : Battery charger.
To   : ROY J. TELLASON
From : TOM WALKER
Date : Tue Jun 21 2005 07:59 am

RJT>JP>        This I will have to research a little, how to regulate it. I hop
RJT>JP>  that an overnight charge ( 10 hours ) will do the trick. Not there yet


RJT> TW> One thing. Note that the numbers are Percent Figures. 10% of MaH
RJT> TW> for Charging, 5% of MaH for Floating.
RJT> TW> And the current dosen't have to be precision.
RJT> TW> That is why I metioned that a simple Resister that would limit the
RJT> TW> "Short Circuit" output of the power supply to 10% or 5% will work.
RJT> TW> Of course a actual series current regulator circuit is better.

RJT>Why?

For the 10% TIMED charge no particualrly reason. BUT for the 5% Trickle
charge you are trying to limit Cell Heating. Particualrly with the NiMH
cells that are more susceptable to overheating. As I recall from my
message the Trickle recomendations are for 3% to 5% of MaH current.
Really a Designed for NiMH Automatic Charger using end point Voltage is
really recommended.
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