Mag Instrument-Maglite ARXX235 Mag Charger NiMH Rechargeable Battery Pack, NEW (NiMH) battery pack for use with any Mag charger rechargeable flashlight offers the prefect drop-in solution with 34% more capacity than our previous battery, and a shorter charging time. And, the NiMH battery is environmentally friendly. The legendary rechargeable flashlight has been the choice of law enforcement, fire and safety, and construction professionals for years.