We are professional battery supplier, we aim at supplying high-quality professional battery products.. We support global distribution in America, Asia, Europe, the Middle East and Oceania, especially for the United States and Canada . ?Compatible models? AT800, AT-800, AT810, AT-810, AT820, AT-820, AT830, AT-830, AT850, AT-850 ?Compatible Part Number? BE-6398, BE-6784 ?Better Quality?: Each of our batteries has strict standard quality inspection, high capacity and high voltage make the battery more stable and durable.?After-sales Service?Your satisfaction is important to us, please feel free to contact us with any question, 24*7 Email support. ?Quality Certification?ROSH, CE and UL triple certification. No memory effect, over-charge, over-discharge, over-heat, over-current and short-circuit protection. ?Battery Parameters? Dimension:120.80 x 101.20 x 8.80mm GrossWeight:350g. ?Battery Parameters? Volts:7.4V Type:Li-ion Capacity:5200mAh / 38.48Wh. ?Compatible Replacement Model? AT800, AT-800, AT810, AT-810, AT820, AT-820, AT830, AT-830, AT850, AT-850.