Basen BS217A battery, 4000 mAh in the 21700 size
20-01-2020, 12:31
The last battery in this roundup from Basen, and this time it’s a model in the increasingly popular 21700 form factor. To some extent, this battery size is replacing the long-established 18650 cells, which have become, you could say, the “standard” for lithium batteries. Inspection, tests, conclusions, and a “strange oddity.”
