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

[Dave Frederickson]

(10-11-2020 08:29 PM)GVHOVE Wrote:  My charger is a very-hard-to-find, vintage W&W adapter for the HP-41 standard battery compartiment (see pictures). Loads the pack overnight without heating up too much.

Your charger appears to charge the 4 cells in series. Is that correct?

(10-11-2020 01:23 PM)BobVA Wrote:  It would be nice to find low self-discharge NiMH LR1 cells, but I haven't had much luck there.

That's because an LR1 is an alkaline battery. An NiMH N-cell is an HR1.

It's kinda like a DB-9 connector, which doesn't exist.

Trivia:
9-pin D-sub connectors have a size E shell, so the designation is DE-9. 25-pin D-sub connectors have a B size shell and are designated DB-25. Folks thought "DB" stood for "D-suB" so they incorrectly called the 9-pin connector a DB-9.