Upgraded 6400mAh 14.4V 92.16Wh Battery - Compatible with Eufy RoboVac X8 Series Robot Vacuum Part Number PA61

Perfect fit for my Eufy RoboVac X8 Hybrid. Very easy to install. No issues so far.

Replaced the battery in my Eufy X8 hybrid with this. Fit and worked perfectly. Vacuum now clean the entire house again and get a stuck less often.

Fixed our battery issue. Last much longer than the original equipment

My eufy x8 wasnt holding a charge. Put this battery in and all is well with the world again.

Bought this to replace the battery I had due to a battery warning sign I was recording. Come to find out it wasn’t the battery but a hardware issue

PRODUCT DESCRIPTION - Upgraded 6400mAh 14.4V 92.16Wh Battery - Compatible with Eufy RoboVac X8 Series Robot Vacuum Part Number PA61UNBIASED - Amazon Vine reviewers are not paid for reviews, be it positive or negative. I will never recommend a product I would not buy myself. I treat ALL vendors with respect and fairness but my duty is to You, the Amazon customer. I am an Amazon customer too. I have every reason to be sincere in my reviews. If it is junk or treasure my reviews will reflect the products, I give my word of honor.PERFORMANCE – It seems like everything has a Lithium battery in it these days, as battery technology continues grow the sophistication of Li batteries is amazing. These batteries actually have the chips to protect themselves from damage using BMS or Battery Management System. The specs tell the tale. The batteries came in properly charged according to the specification. Don’t be alarmed if your battery arrives at 90% capacity, because that level of charge is sometimes used for battery health, again in some cases. I ran 25 discharge/charges cycles with NO change in capacitance! The amperage was great as a matter of fact. I could detect any drop in charge capacity. Very impressive. You can't get that type of performance if a battery is of poor design and construction. I will definitely keep this company in mind for replacement Lithium batteries and I recommend you give them a try too. The numbers don't lie.UNBIASED - Amazon Vine reviewers are not paid for reviews, be it positive or negative. I will never recommend a product I would not buy myself. I treat ALL vendors with respect and fairness but my duty is to You, the Amazon customer. I am an Amazon customer too. I have every reason to be sincere in my reviews. If it is junk or treasure my reviews will reflect the products, I give my word of honor.PERFORMANCE – It seems like everything has a Lithium battery in it these days, as battery technology continues grow the sophistication of Li batteries is amazing. These batteries actually have the chips to protect themselves from damage using BMS or Battery Management System. The specs tell the tale. The batteries came in properly charged according to the specification. Don’t be alarmed if your battery arrives at 90% capacity, because that level of charge is sometimes used for battery health, again in some cases. I ran 25 discharge/charges cycles with NO change in capacitance! The amperage was great as a matter of fact. I could detect any drop in charge capacity. Very impressive. You can't get that type of performance if a battery is of poor design and construction. I will definitely keep this company in mind for replacement Lithium batteries and I recommend you give them a try too. The numbers don't lie.

Plugged right in, runs the vacuum properly and takes a charge correctly.Recommended.

I bought this battery on March 1. It is now failing on a regular basis. I keep getting RED indicator lights and an S2 code indicating a battery failure. I cannot find where / how to contact the vendor for a warranty /failure return. Truthfully, I didn't find much difference between this souped up one at 6400 that I did with the standard 5200 one. I've looked around and can't find where /how to contact the vendor for a replacement unit. So I wrote this. Could be a one-off issues, could be a regular thing. You've been warned.