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rechargeable battery series question

4 months ago

I have a SAD light that is used for seasonal depression, that I bought ten or fifteen years ago. I haven’t used it but my daughter wanted to try it, so I found it and it works, but it won’t hold a charge.

I opened it up and found the series of rechargeable batteries. They are 2/3AA size and there are seven in series, each one is 1.2 V and 750 mAH. All have a good charge except for one, which has no charge.

I was going to replace just that one, but I don’t know whether it is NiCd or some other type.

I took off the plastic wrap that held all 7 of them together, but there is no information at all on the individual batteries.

The label on the plastic wrapping said:

NIKKO

7NK-2/3AA750mAh

8.4V 8G07

If I knew what type of batteries they are, I could buy one to replace the bad cell.

Otherwise I would have to buy 7 of them and wire then in series, or find them pre-wired, but it would cost a lot more.

But maybe newer batteries would be a better idea overall anyway?

I would be grateful for any advice on how to proceed. Thanks very much.

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Comments (2)

wdccruise
4 months ago
last modified: 4 months ago
I see your question was answered here: https://budgetlightforum.com/node/83327

But Amazon has a gazillion of these lights -- including ones that don't require batteries -- starting at $20.
deepdrop thanked wdccruise
deepdrop
Original Author
4 months ago
wdccruise, Thank you for your comment. Actually, I've been finding it almost impossible to find the battery pack I need anyway. So I've been looking at the lights on Amazon. The thing I was really hoping to do with mine, was to have the light turn on in the morning as an alarm. I may just buy one with that feature, but I have learned that to be helpful for seasonal affective disorder, they need to be 10,000 LUX. I'm not sure how I could confirm that a cheap light meets those specs, even if they say they do but that's probably the route I'll end up taking.
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