We have a solar powered alarm clock which automatically synchronises with the terrestrial time signal. The clock is marked 'PRECISION', 'SOLAR POWER' and 'RADIO CONTROLLED'.The display became faint and eventually it stopped working. I took a look inside. There was an unmarked AA size battery (leaking blue liquid which I cleaned up). I measured the battery's voltage which was 1.6V, well above that of a normal rechargeable (1.2V?).I presume the battery is the source of the problem. I tried replacing the battery with both rechargeable and non-reachargeable AA ones, but the unit still didn't work.I suspect that the original battery was much more than 1.6V - maybe 3V? But I can't find any references torechargeable AA-sized 3V batteries. Can anyone suggest where to get a replacement battery (or other ideas)?Cheers.

terrestrial time signal. The clock is marked inside. There was an unmarked AA size battery (leaking 1.6V, well above that of a normal rechargeable battery with both rechargeable and non-reachargeable AA can't find any references toreplacement battery (or other ideas)?Any sign of damage to the PCB from the leaking electrolyte?I think you are reading too much into the >1.5 terminal voltage with no load.

3V AA sized rechargeable battery???

Dec 04, 2010 21 Replies

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Phil Jessop 15 years ago

It is probably a Lithium Thionyl Chloride which have a terminal voltage of

3.6V. You can get them in both 1/2 AA and full AA sizes. Try Budget batteries

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Ian Stirling 15 years ago

How heavy is this? NiCd and NiMH batteries are considerably heavier than lithium of any sort. I would - as others have suggested suspect a 3V lithium non-rechargable battery - simply as rechargable lithium are more expensive.

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