This are 18650 mod with booster, 5 click on/off, revers polarity protection and short circuit protection. This comes after a time of testing and produced. Fixed value at 4.2V.
It`s aluminium alloy and comes polished or anodized (without painting).





























...and anodized (made only for test):




It`s aluminium alloy and comes polished or anodized (without painting).





























...and anodized (made only for test):



