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

[GVHOVE]

I have been using rechargeable N-type batteries for years in my HP-41

Brand is XCell - X500NH - 500mAh Ni-MH.

In Europe you can order them here : https://akkuplus.de/XCell-X500NH-Lady-N-...0mAh-Ni-MH

My HP-41 is used almost daily (that might change since I have just received my SwissMicros DM41X in the mail) and never had any issues with them.
I do replace them every year or so to avoid leakage.

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.