Features:

• Hawink Mini Wireless Tattoo 3.7V Lithium Battery 2400mAh,LED- Digital Display that provides high and efficient performance. It is an upgraded version of the battery.
• It has a capacity of 2400mAH, Fully charged, Run 4.5 to 11 volts. Lithium battery lasts 5-8 hours depending on your voltage and motor.. It comes with a 13 level voltage control from 5V-11V. If you have 2 pcs power packs, you can tattoo for a whole day session! Charge one battery pack while you tattoo with the other! “
• Note: In order to extend the battery life, it is recommended to charge and discharge the battery at least once a month.
• USAGE & INSTRUCTIONS – For details, please refer to the instructions.