Thinking about an HP-41CL

[Dieter]

(07-27-2016 02:17 PM)Dave Frederickson Wrote:  Using the adapters above, the charger makes contact with the adapter, not the battery.

Argghhh... sometimes you don't notice the most obvious... #-) If the adapter is designed the way you described it should indeed work with both flat and button top batteries. On the other hand my homebrew AA-N-adapters are used the other way round: the adapter has the minus side and the plus side is the battery itself. ;-)

Edit: I just did a Google search for "adapter AA N" and found my picture of the mentioned DIY adapters in the 2011 forum thread. ;-)

Dieter