subybaja
E. Spengler
Oh great. And I was just getting rid of my AAs in favor of 18650s! Thanks a lot.21700 batteries are also fuckin awesome. I'm phasing out my 18650s for them.
21700 vs 18650: Behind the Lithium-Ion Battery Cell Battles
Comparing 21700 vs 18650 lithium-ion battery cells, we find cordless power tools benefitting from more power density and better cooling tech.
www.protoolreviews.com
21700, 18650, 20700 and others simply refer to the physical size of the lithium-ion cell. For 18650, it’s an 18 mm diameter x 65 mm length. 21700 is 21 mm x 70 mm. While the explanation is simple, the difference is profound.
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Batteries that we see using 18650 cells for power tools range from 1.5Ah (1500mAh) to 3.0Ah (3000mAh) in each cell.
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On the other hand, 21700 cells start around 3.0Ah (3000mAh) and go up to 4.0Ah (4000mAh)