Battery. Similar to original HM71R supplied, no difference.
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This product cannot be delivered outside of the European Union due to restrictions in airfreight regarding batteries.
This is one hefty package of electrical capacity. Being a size 21700 (76 x 21.5 mm) battery, it is compatible with a limited range of lights, such as Fenix models HT18, PD36R, TK22 V2.0, TK22UE STRIKER.