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How long of a runtime will I see with the Fenix ARB-L18-3500 18650 battery versus the ARB-L18-2600 18650 battery?

From the 2600mAh to the 3500mAh battery, you will get an ESTIMATED 30% longer runtime between charges with the 3500 battery. As with all batteries, the environment temperature affects the run time of the battery. 18650 batteries won't operate in below freezing weather.

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