@rasterweb the problem with these type of multi-tap situations is that when you drain the bottom cell faster, the other two cells can continue to provide current and reverse charge the first cell beyond zero and cause a leaky mess.

The ideal solution is to find a little DC-DC module that steps the 4.5V down to 1.5V.

I just introduced Millie to the glory of electric blankets on cold winter days today. #dogsofmastodon