Replacement Battery for Roborock S4 S5 S7 S6 Max/Pure/MaxV/MaxV Ultra Q5 Q7 S8 Max+/Plus/Pro/Pro+ S50 S60 T4 T6 T60 T65 E4 E5 E20 E25 E35 for Xiaowa C10 E351-01 Xiaomi mijia/Mi, 14.4V 6700mah

My original Roborock battery died and I needed a new replacement. This battery has excellent capacity, enabling the vacuum to cover large areas without frequent recharges. After installation, the vacuum runs smoothly and efficiently, with no noticeable difference from the original battery. The installation process was straightforward, even for those who are not particularly tech-savvy. I found it durable since the battery showing consistent performance after multiple charging cycles. So far so good.

Recently replaced my OEM Battery and this has been doing a great job on my Roborock S6 Max V. No complaints, time will tell how long it lasts.

I have S4 Max I bought ~3.5 years ago. Battery has degraded to the point where it will leave two bedrooms uncleaned and go to base to charge before completing the cycle. I installed this battery, left it to charge over night, and next day at 1:30pm my vacuum wouldn't clean one of the rooms and went to charge instead.So I decided to fully charge the battery with lab bench power supply and test its capacity. With discharge down to 3.0V per cell at 2.0A of current it scored 4.4Ah. So it has ~66% of claimed capacity.Additional problem is that the vacuum won't drain battery down to zero during cleaning as it wouldn't be able to come back to the base to charge otherwise. I noticed that S4 will go charge when it reports <20% capacity remaining, and battery will have around 3.7V per cell at that point.That means that even with this capacity, voltage drop is big enough so the vacuum can't clean my whole floor on one charge. Any my house isn't that big - app reports around 55m2 or almost 600 sq ft.When original battery was new, I could set it to clear whole upper floor (55m2) and then carry it downstairs and clean additional ~30m2 (300 sq ft) without charging in between.Good thing that I can return it and get my money back. Maybe I got unlucky, but it's time to try another brand.

I was skeptical of this battery due to all the other reviews being all over the place. I went to a bunch of other options on Amazon and ended up taking a chance on this one.I'm glad I did, as my Roborock S7 can finally clean a majority of my bottom floor of my house without having to charge. It's amazing for this 4 year old vacuum to feel new again.It could very well be a lottery type situation and I just got lucky, but my advice would be to give it a shot and if it doesn't work out return and try again.I can't vouch for the bigger capacity, but it doesn't matter to me as long as it's at least back to what I had when I first bought it.

I’ve had this battery for several months now, and it’s still going strong. It was a drop-in replacement for my Roboroc vacuum that no longer would hold a charge long enough to complete a cleaning cycle. This battery fits perfectly and took about 5 min to install. Highly recommended.

After 3 or 4 long faithful years of no issues with our Roborock, it kept dying while the charge was still decent, and we had to carry it back to the docking station. We proceeded for about a week and broke up the schedule to not do multiple rooms at once, but alas the battery kept getting worse.So far we have only had this for a couple of weeks but it completely fixed our battery issue. I am super pleased! I heard it was easy to install but I leave that to my man. I hope this lasts another few years. I love my roborock!

This appears to be a good replacement for the Roborock S4 Max battery. I was a little concerned because this battery actually weighs slightly less than the factory Original battery. Less weight is odd because this battery has a higher amp hour rating than the factory original. The battery was easy to install and appears to be working as intended. Be aware that when you remove the bottom panel from the robot vac, you will need to remove a piece of tape covering one of the screws. This will let the company know you have opened the unit. The robot vac appears to be working as it did when new. No error messages and great performance. I would recommend this battery for anyone with a similar model vacuum.

After 4 year my Roborock S5 battery quit working. The vacuum battery was drained half way of my house and would not return back to the dock to recharge. I installed the new battery and worked perfectly. Then vacuum my entire house and used less than 50% of the battery. The vacuum was a little faster with the new battery.