The HMP-1510 Advanced Part marking system was designed specifically for aerospace product identification. The system can mark parts as small as fasteners to as large as wing spars from the same platform inkjet print head in . However, bringing large products within the reach of the marker's umbilical was difficult, and moving the part marker where it was needed required electrical and air connections. The Power Cart addresses this by supplying its own power. Using AGM rechargeable batteries , the HMP-1510 system with a fixed battery pack unit can operate up to 8 hours before recharging. The onboard inverter/charger allows the system to recharge at any convenient 120 VAC outlet during use to extend battery operation. Using the optional dual battery pack allows 12 hour operation on one pack while the other pack charges in the change station. The cart aligns and locks into the change station where the battery packs are pulled on and off using rollers. Plunger pins safely hold the packs in place on the cart and in the charge station.