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It is for use only by factory-certified technicians performing authorized warranty service on the Mag-Lite® and/or other Mag-Lite® System™ components.

MAG-TAC® LED System • High capacity Lithium Iron. Phosphate (LiFePO4) battery engineered for long service life. •

FULL-SIZE, PROFESSIONAL GRADE LED POLYMER Full-sized, full-feature polymer with C4® LED technology that delivers a 490 meter beam distance.

https://en.wikipedia.org/wiki/Rechargeable_battery

https://en.wikipedia.org/wiki/Rechargeable_alkaline_battery

Rechargeable Batteries | eBay

Chargers | Koehler-Bright Star | Wilkes-Barre …