NiMH or Lithium?

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Joined: 07/08/2016
Location: United States
Posts: 491
Posted: 09:06am 21 Mar 2023      

What is the drain like? I have been using some 1.5V that have usb charge built in.
  There are 9V that do the same. Might be a way to go even if having to recharge
  every few months or so.

 Something like this 9V recharge able

 Im looking at 5.5V 4F caps as a temp brown out fix.