The Panasonic 3100mAh batteries provide optimum performance, are long lasting (length - 65mm, correct size for Lava)
The supplied 18650 batteries are genuine, safe, unprotected and suitable be used in devices with circuit protection such as the lavatube and provari.
Note: The length of time between charges is greatly effected by the resistance of atomisers/cartomizers used. Mods such as the Lavatube work best with High Resistance (>3.5ohms) atomizers and the time between charges decreases as the resistance deceases. Ensure batteries are recharged when thw voltage falls to 3.7v to maximise the life span of the batteries.