FAQ: Battery Amperage Limit?

Electronics Review Class: Batteries 101

Amperage limits of the commonly used batteries:
source: ecf and candlepowerforums

AW IMR 18650 (Li-Mn) - 10A
EFEST IMR 18650 2250mah (Li-Mn) - 10A
Panasonic CGR18650 2250mah (Li-Mn/Li-Ion hybrid) - 10A
Panasonic NCR18650 2900mah (Li-Ion) - 5.8A *common type of laptop battery*
EFEST 2600 mah (Li-Ion) - 4.2A

Pag mas maiksi ang batteries (18500, 18350, 14500, etc), mas mababa ang amperage limits nun. Which means that in theory based on chemistry, the batteries were designed to have a certain discharge limit which could cause it to malfunction.

Sample equations: you can check via http://ohmslawcalculator.com/ohms_law_calculator.php
Let battery charge = 4.2v (fresh off the charger)
10A minimum resistance is 0.42 ohm
5.8A minimum resistance is 0.72 ohm
4.2A minimum resistance is 1 ohm

When the mod gets shorted, the resistance becomes very close to 0, if not 0. If we put it even at 0.01, the amperage drain becomes 420A (on 4.2v charge) which is way off the charts for any battery to handle. And explosions or violent gas discharge percentage is greater when your batteries do not have safe chemistry (not Li-Mn batts. source - ecf and candlepowerforums).

What does this mean on lay man's terms? May certain resistances lang na kaya ang mga baterya. Going beyond this amperage limit can and will damage your batteries and could cause it to die or worse, explode.

This friendly reminder is brought to you by your fellow vapers. Safely keep on vaping!