energup 14.4V 6500mAh Li-ion Replacement for Xiaomi Battery Mi Robot for Xiaomi Mijia Roborock S50 S51 Robot Vacuum Cleaner for Mi Mijia Battery

As expected this battery fit my Roborock S4 Max and I suspect it will fit other models as well. In case your particular model is not listed ( a common omission) just remove your old battery and compare it to the photos of this battery paying close attention to the shape and plug details.My original Roborock battery was showing reduced run times and usually could not finish our 926 sq. ft. area. The original battery had an accumulated 303 hours and 200 thousand sq. ft. of service life but now needed to be replaced.Questions are: Does this new aftermarket battery work and how long will it last before needing to be recharged? In my case the answers are Yes, it does work and my vacuum ran for 82 minutes, vacuumed 926 sq. feet and returned to the dock with about 40% charge left. So all is good at this early stage. Considering the games that are played with aftermarket power and life claims I'll wait to see if how battery compares to the original OEM one.

Have it for few months, works fine so far. I have not measured its actual capacity but when vacuum is done vacuuming my space, there is more battery left than with the original.

So far it is working, I had to leave it rest and then disconnect and reconnect the base but seems to work fine, time will tell.

Followed online instructions to access and replace the battery on my 3yo Roborock S7. After an overnight charge the robot followed my regular schedule. Runtime increased from 20 minutes to almost 2 hours (i.e. original experience). Will provide an update if I see a dramatic drop in capacity, as some other users (for various vendors) have reported, after a few months.

Purchased this for my roborock s5 to replace the original battery that lasted many years. This new battery died just over a year later and energup won’t warranty. Vacuum just dies in the middle of cleaning.

The battery fit perfectly, and was easy enough to install.Unfortunately the longevity of the battery seems to be much less than the original installed battery from roborock. The original had lasted over 7 years of daily use, whereas this one is failing after only 14 months of light use. (This vacuum became my second vacuum after upgrading early last year, and was moved to a much smaller floor plan in the house).I recommend a different vendor.

This battery fit perfectly into our Robotic. Now itlasts longer than before, got new rollers too. It was easy to install

Battery size: Battery suggests a higher Wh than the stock battery (5200 vs 6500), so time will tell how accurate that is. First run was able to complete my house in one pass like the old battery wasQuality: I find most 3rd party batteries are of lesser quality and last shorter before degradation. Multiple review sources confirm this as well. Time will tell with this one.Value: $44 to restore the battery life suggests a good benefit to cost ratio to me!