Extended Li-Ion battery with LED and twice the capacity for use with the Zebra ZQ610, ZQ620, QLn220, QLn320, ZQ510, ZQ511, ZQ520 and ZQ521 mobile printers. PowerPrecision+ 4900mAh Li-Ion Rechargeable Battery. NOTE: LED indicates when the battery is beyond useful life and due for replacement.
Detailed Specs
Zebra Mobile Printer Accessory Guide.pdf
https://www.thermalprintersupplies.com/content/product_downloads/zebra/Zebra Mobile Printer Accessory Guide.pdf