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Innokin Cool Fire Z50 Battery - Black
There is an extra ON/OFF switch located at the bottom of the battery as an optional additional safety measure. When the switch is in the ON position you click the fire button 3 times to switch it on or off.
Battery life: 2100mAh (generally this should last at least 1 day on a single charge - try not to leave your device charging for long periods of time, it only takes a couple of hours to charge). The charger port is found on the side.
This battery contains a high quality bright OLED screen. To change the watts simply hold down either the up or down arrow and then choose your preferred wattage (6-50W).