Buy Zebra HQLN420-LI, Battery QLN420, Li-ion - Mega Depot
Amazon.com: Artisan Power Replacement Battery for Zebra Printer Models QLn320 QLn220 (HC), ZQ500, ZQ510, ZQ520, ZQ610, and ZQ620 Mobile Printers - Rechargeable Lithium Ion Battery 3180 mAh for Max Life : Office Products
Zebra QLn420 Barcode Printer, WiFi, Bluetooth w/ Battery, Charger, Belt Clip! | eBay