Olight 26650 4000mah Protected Lithium-ion Rechargeable Battery
The Olight 26650 Lithium-ion battery is designed to be used in the R40 Seeker and the S80 baton.
It is 3.7 Volts and 4000mah.
Can't be recharged with a standard Li-Ion charger but only inside the body of the flashlight.