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Lion battery voltage discharge

Old 02-11-2021, 04:33 AM
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Default Lion battery voltage discharge

Can anyone tell me the lowest safe voltage should be on my ZOHD 2s 3500MaH battery?

Is it the "End Voltage"? If so it would have a voltage of 5.0 volts, is that correct?

Here's the spec sheet.

Thanks, Jim

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Old 02-11-2021, 05:59 PM
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I would not go below 3v as an absolute minimum and don't go below 3.3volts in general practice. My buzzer goes off at 3.5 volts on some of my planes, but sometimes I get a quick buzz on a heavy draw, then the voltage comes back up. If it buzzes steady, I land.

If you go too far, the battery may not charge back up.
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Old 02-11-2021, 06:33 PM
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According to various online .... 18650 LiIon are often discharged to between 2.5 and 3.0v at which auto-cut-off occurs. But unprotected cells will of course carry on till user switches it off.

It is advised on 3.7V nominal (4.2V max) LiIon 18650's to not go below 2.8V ... but recc'd not to go below 3.0V .. with 3.2V even better.

My Radioking TX has a two 18650 cell power pack in it and my alarm sounds at 6.6V .... (3.3V per cell).
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Old 02-11-2021, 09:39 PM
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Thanks guys, just what I needed.
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