Here comes the elegant and compact OUMIER Flip Battery Mod powered by 550mAh internal battery and only needs 60mins for a full charge. The Flip battery will bring you smooth and better flavor with 10 seconds pre-heat function. The voltage is adjustable with 3.2V in blue light and 3.5V in green light. The Flip battery is very easy to use with one key overall control to have a great vaping. Most importantly, the vaporizer vape battery is highly compatible with both 510 thread and 13.8x5.6mm cartridge to meet your different needs.