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How big are the Fenix 21700 batteries?Updated 2 years ago

The dimensions of the Fenix ARB-L21 series 21700 battery is 76mm x 21.5mm (.85" x 2.99"). The Fenix 21700 lithium-ion battery is a powerful and protected cell. It's compatible with many flashlights such as the Fenix PD36R.

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