jersey_emt
Full Member ECF Veteran
Join DateAug 2009LocationNew JerseyPosts136
[h=2]
Battery numbers (18650, 18350, 18490, etc.) -- what they mean[/h]
Full Member ECF Veteran
Join DateAug 2009LocationNew JerseyPosts136 [h=2]
If anyone is curious what the different battery "numbers" (18650, 18350, etc.) mean, it's quite simple.
The first two digits are the diameter of the battery in millimeters.
The last three digits are the length of the battery in tenths of millimeters.
So an 18650 battery is 18 mm wide and 65.0 mm long.
18350's are 18 mm wide and 35.0 mm long.
18490's are 18 mm wide and 49.0 mm long.
Note that these are approximate dimensions. For example, an 18650 battery may be a bit longer than 65 mm, especially if it has a protection circuit.
Also, these numbers designate size only. Capacity (mAh) and maximum rated output (amps) depend entirely on design. Always check the manufacturer's specifications and be sure that you are not trying to pull more current from your batteries than what the manufacturer designed it for.
The first two digits are the diameter of the battery in millimeters.
The last three digits are the length of the battery in tenths of millimeters.
So an 18650 battery is 18 mm wide and 65.0 mm long.
18350's are 18 mm wide and 35.0 mm long.
18490's are 18 mm wide and 49.0 mm long.
Note that these are approximate dimensions. For example, an 18650 battery may be a bit longer than 65 mm, especially if it has a protection circuit.
Also, these numbers designate size only. Capacity (mAh) and maximum rated output (amps) depend entirely on design. Always check the manufacturer's specifications and be sure that you are not trying to pull more current from your batteries than what the manufacturer designed it for.
