You'll never get left in the dark if you equip your high drain flashlights with a Nitecore 18650 battery! The NL1835 has the highest capacity in the series with 3500mAh, so it's capable of extra-long runtimes. The design is made cost-effective and environmentally friendly with state of the art, rechargeable li-ion cells.
Why choose this battery?
A flashlight's brightness is dependent on the battery's voltage (V) , while it's runtime is subject to the battery's milliampere hour (mAh).