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Author Topic: Central Heating controller  (Read 647 times)

Jurek

Central Heating controller
« on: 08 February, 2024, 04:54:57 pm »
I have a radio-controlled device with which I operate my CH.
The controller runs on a pair of AAs.
I last changed the batteries less than a couple of weeks ago, and the 'replace battery' icon has already appeared on the screen.
I'm using Fujitsu 2450mAh rechargeables which are recently purchased and have been subjected to very few re-charging cycles.
Are these devices unusually power hungry?
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Kim

  • Timelord
    • Fediverse
Re: Central Heating controller
« Reply #1 on: 08 February, 2024, 05:02:00 pm »
Its battery warning is probably calibrated for the higher cell voltage of alkaline batteries, rather than (presumably) NiMH.
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Jurek

Re: Central Heating controller
« Reply #2 on: 08 February, 2024, 05:05:00 pm »
That'll be it then. :thumbsup:
They are indeed NiMH.
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Karla

  • car(e) free
    • Lost Byway - around the world by bike
Re: Central Heating controller
« Reply #3 on: 08 February, 2024, 05:49:04 pm »
Check their voltage with a multimeter, see if they have dropped significantly below 1.2V.  If not then, as Kim says, the unit is expecting alkaline cells.
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Kim

  • Timelord
    • Fediverse
Re: Central Heating controller
« Reply #4 on: 08 February, 2024, 05:52:32 pm »
The real question of course is whether it'll sit there with a low battery icon and work fine for ages, or whether it will decide the battery is flat and preemptively conk out.
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Jurek

Re: Central Heating controller
« Reply #5 on: 08 February, 2024, 07:55:35 pm »
Previous experience is that it'll carry on for ages despite crying 'I want new Duracells'.
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