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Electronic Thermostat - Rechargeable Batteries?

  • Last Updated:
  • Feb 3rd, 2021 3:11 pm
Deal Addict
Aug 27, 2009
1373 posts

Electronic Thermostat - Rechargeable Batteries?

Anybody have success using rechargeable NiMH batteries (AA or AAA) in an electronic thermostat for OPERATING power (not backup power).

I understand the reason why alkalines are recommended (cell voltage) vs rechargeables but the situation is this:

- Want to install simple, non-programmable electronic stat into my mom's home.
- Basic non-electronic stat is currently installed but I need more control over cycle rate. Stat anticipator is maxed out.
- Not enough conductors on her thermostat cable for line power, too difficult to pull a new cable plus line-powered stats are typically full-featured touchscreen which she'll mess up.

I'm hoping to swap in (re)charged batteries every couple of months vs continually replacing alkalines well before they are drained. My mom is not capable of replacing batteries herself.

1 reply
Deal Fanatic
Dec 24, 2005
5628 posts
why not just put in AA lithiums?

it might last you like 5 years depending on how often you poke at it