I like these — they are some of the best for high output and slightly shorter (not protected) —I find protected cells in a Tool 2.0 are too long and mess the tail spring up—-If you are giving these lights as gifts to people who know nothing about Li on safety — I would just buy a 4 pack of Eneloops with 2 NiMh chargers —-FOR SAFETY

cells—— https://www.illumn.com/batteries-chargers-and-powerpax-carriers/batteries/14500-vapcell-icr14500-1000mah-3a-high-discharge.html

charger—-https://www.illumn.com/batteries-chargers-and-powerpax-carriers/chargers/xtar-ant-mc1-plus-li-ion-usb-charger.html