... for diabetes travel use is lightweight and small, support battery power systerm as well as AC100V~240V and DC12V, ... and fashionable2. Support DC12V DC, AC110V~240V, 7.4V battery, Battery ensure more than 12 hours working while no vehicle power ... DC12V/DC9.0VCurrent (vehicle power )2AVoltage ( lithium battery)DC7.4VCapacity ( lithium battery)Internal 2300mAh/external 8200mAHPower rating 7.6W/ DC9.0V ...