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Old Jan 22, 2015, 06:56 PM
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Any way to charge this NiCd?

I have a Graupner Polaron EX Charger. I'd like to know if there is any way to charge the below battery and if so what settings would I use? It's my daughters and she's lost the original charger that came with it. No other info is on the batter that I can see.

I do have clips that can clip to the terminals on the battery.

I'm fairly new to charging and have only done Lipo's on the EX.

Thanks
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Old Jan 22, 2015, 10:46 PM
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Is there another label that shows the mAh rating of that battery? Charging is current-based, so the mAh value would be critical to setting the correct charge rate. If you have no label, then I'd charge it at a 50mA charge rate for more than 24 hours, and discharge it with the charger, just to see what the capacity might be. I'd use that current because you can leave a NiCd charging at 1/10C or less for a fairly long time, without damage. I would assume that it is more than 500mAh capacity, so 50mA would be less than 1/10C.
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Old Jan 23, 2015, 04:29 AM
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Since the Polaron EX is only intended to charge 1-14 NiCd cells and that battery has 16 cells I'd say you have a real problem. You might be able to get a partial charge into it but I wouldn't trust it myself. Sorry.

Steve
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Old Jan 23, 2015, 10:32 AM
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I find it curious that charger is rated for 7 LiPo cells, meaning the output voltage can reach 29.4V, but only 14 NiCd cells, which only require 21.7V. Must be something in the delta peak detection that limits it?
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Old Jan 23, 2015, 11:41 AM
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Quote:
Originally Posted by slipstick View Post
Since the Polaron EX is only intended to charge 1-14 NiCd cells and that battery has 16 cells I'd say you have a real problem. You might be able to get a partial charge into it but I wouldn't trust it myself. Sorry.

Steve

Thanks. That answers my question. The Chargers for these batteries are still available. Looks like I'll be ordering a replacement. They are pretty inexpensive and easy for my daughter to use so that would prob be better anyway.
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