Absorbent Glass Mat (AGM) Technology Maintenance-Free Design with Spill Proof Construction Brand New, Factory Fresh 1 Year Warranty This is a Replacement Battery for the Xantrex Technology XPower Powerpack 300 Plus Jump Starter. It is a high quality SigmasTek SP12-22 NB battery - 12 Volt 22 AH Sealed Lead Acid Battery with NB Terminal.