what is the lowest safe resistance for use with a Samsung 25R 18650 2500mah battery? ive heard and read so many different things. im looking for some clarity. Ohms law says .123 but some people say you can go lower with out an issue
batt safety question
- Thread starter woodworker
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Define " safe ", also it depends on if you're using a regulated APV with built in protection and amp limiting circuitry or a mechanical with none.
The battery in question has a maximum continuous discharge rate (CDR) of 20 amps.
4.2 / .123 = 34.14 a ~ 14a above CDR.
4.2v / .21 = 20a
4.2 / .3 = 14a
Even if you used 3.7v in calculating for some strange reason, 3.7v / .123 = 30. 08a ~ 10a above CDR.
Exceeding any battery's CDR is never a good or 'safe' idea.
Then there is the inaccuracy of what you use to measure resistance to consider. (+\- what % in what specific range)
The battery in question has a maximum continuous discharge rate (CDR) of 20 amps.
4.2 / .123 = 34.14 a ~ 14a above CDR.
4.2v / .21 = 20a
4.2 / .3 = 14a
Even if you used 3.7v in calculating for some strange reason, 3.7v / .123 = 30. 08a ~ 10a above CDR.
Exceeding any battery's CDR is never a good or 'safe' idea.
Then there is the inaccuracy of what you use to measure resistance to consider. (+\- what % in what specific range)
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