The extended runtime kit from Fenix comes with a modular extension tube and a battery holder for four 18650 Li-ion batteries. It is compatible with TK75 flashlights. Multiple extension modules can be attached to provide additional runtime. The battery m
The extended runtime kit from Fenix comes with a modular extension tube and a battery holder for four 18650 Li-ion batteries. It is compatible with TK75 flashlights. Multiple extension modules can be attached to provide addi...
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