HP41, N battery (N Cell), charging of HR1

[Dave Frederickson]

(10-12-2020 08:34 PM)Erik-M Wrote:  Charging with 50 mA is a bit tricky because you don't see the voltage drop indicating the call is full, but I set the timer to 16 hours as indicated on the cell and that worked fine.

One, at 50mA charging current (0.1C) I wouldn't expect the -deltaV circuitry to detect end-of-charge. The recommended minimum charging rate is 0.3C.
Two, the MC3000 has a Break-In Mode built in, so why are you manually timing charging???

Dave