There are two versions of the built-in 18650 battery: 
3.6V 3200mA and 3.6V 3600mAh and both of them are on sale now!!

● Cree XM-L2 U3 LED light source
Max output up to 1020 Lumens with 9600cd
● 5 brightness level plus strobe mode
Turbo - high - mid - low - moonlight - strobe， meets your various purposes in all occasions
● IPX-8 waterproof standard
Protects S30R Baton Ⅱ in water up to 2m
● Built-in highest capacity of 3200mAh 18650 battery. But using 2 x CR123A battery is allowed as well cause its wide range of current circuit (Only 18650 can be charged)
● Fast and easy charging
Features a micro USB charging dock includes an additional USB output to charge other devices
● A strong magnetic flat tap cap / removable pocket clip / reverse polarity protection / management safety program
You can count on to meet all of your lighting needs with an overall quality lighting experience