Suggested Retail: $51.28. 6400mAh Replacement Battery for Eufy RoboVac X8 Series Robot Vacuum - This is a 6400mAh replacement battery for Eufy RoboVac X8 series robot vacuum. It's a rechargeable Lithium-ion battery pack PA61 that is easy to replace at home. Ideal for those whose robot vacuums are having trouble charging, randomly freezing, or experiencing reduced battery life. To maintain high performance, use the sweeper often, keep it powered on when not in use, and keep it in a dry, cool place. Brand: Gikysuiz Model: PA61 -- LOT STICKER: TCE-BOX-BOXTCEE0044-ITEM-478cfcb4___LPNNG4B2VGYFM Gikysuiz 6400mAh Replacement Battery for Eufy RoboVac X8 Series Robot Vacuum fits Part Number PA61 Lithium Ion Sweeping Robot Battery 14.4V 92.16Wh -- SIZES ARE ESTIMATED. 7 CALENDAR DAY FULL REFUND GUARANTEE (FROM PRIMARY PICKUP DATE) ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 CALENDAR DAY STORAGE (FROM PRIMARY PICKUP DATE) IS ALSO AVAILABLE. THE PRIMARY PICKUP DATE IS THE DAY AFTER THE AUCTION ENDS. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.