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Isn't 18650 essentially a generic part number, with numerous providers? These batteries don't even have to have the same capacity (I've seen many 2700mAh, 3000m
by YjSe2GMQ 7y ago
Isn't 18650 essentially a generic part number, with numerous providers? These batteries don't even have to have the same capacity (I've seen many 2700mAh, 3000mAh and 3300mAh), just same package. I'd wager that this is the most common form of a lithium battery available on the market.
- pjc50 7y agoIt's not even a part number, it's a form factor + approximate voltage expectation, like "AA" or "D" cells.
- jsmith45 7y agoTechnically it is only form factor. The common CR2032 coin cell uses the same number system. The first 2 digits are the diameter in millimeters, the remaining digits are the height in tenths of milimeters. So a CR2032 is 20mm across and 3.2mm tall. The "CR" portion is what indicates the battery chemistry. The correct IEC notation for would be ICR18/650 where the first two letters specify the specific anode and cathode material (I've picked the letters most commonly seen in examples). Those letters are absolutely critical in determining the nominal voltage, because without them, we could even be describing say an alkaline disposable cell of the same shape (LR18/650 would be such an non-rechargeable alkaline battery of the same shape).
- karlding 7y ago18650 describes the form factor of the cell (18 mm in diameter and 65 mm in height), much like you have AAA batteries.