NASTIMA S330 Security Rechargeable Battery for eufy S230 S330 S220 E330 | for Eufy Video Smart Lock 3-in-1 and Smart Drop T8520 T8520S T8520J11 T8531 E8531JY1 T8520T11, 10500mAh Battery Replacement

this battery works great! too bad eufy won't make a few extra battery covers for holding the battery in. such a great lock, why is the cover so cheap with only two plastic tabs on a door that has to open every other day to charge.Oh, well... This was about the battery, not the @eufyThe battery charged right up. Not sure how fast, as I didn't need it right away and let it charge until I did. I charged it sveral times before selling the house and had no issue whatsoever with the battery itself.

very good quality

Five stars

Doesn't last as long as the genuine Eufy batteries, but it's nice that it's USB-C instead of micro USB

I HAVE THIS AS A SPARE FOR MY EUFY SMART LOCK E330, I USE IT WHEN THE BATTERY OF THE LOCK THAT COMES WITH IT NEEDS RECHARGING. THIS BATTERY DRAINS WITHIN A WEEK OF USING FROM FULLY CHARGED, SO FAST COMPARED TO WEEKS OF USING THE ORIGINAL BATTERY OF THE LOCK.

Excellent replacement for the original battery. With the smart locks on my Disney cabins I need to make sure the batteries are always functional while I’m not there and this really helped. Now my helper just swaps out batteries from fresh charged and they last about 1-2 months between changes.

Arrived as advertised. Work great.

AWESOME SAUCE!!!!

I have had this battery for about a year now. The charge lasts around 49 days in the summer and perhaps around 30 days in the winter (-30C sometimes), before I get the notification from the Eufy mobile app that the battery is running low. The charge on the original Eufy battery does not last longer than the Nastima battery so this is a good buy.

I don't know how the heck to contact the seller. Trying to be nice about it but this battery is dead on arrival. I thought it just needed charging but it flashes green while charging like there's a problem. Tried different charging cables and chargers. I was able to get this battery to last about 2 days and now I'm using the original Eufy battery that lasted years and still lasts a week after years of use. Refund or replacement please.

Excellent produit!

Works well and no issues after a few months of usage. Battery seems to last long.

This was purchased to keep the door locks working when the OEM battery needed charging.It’s just as good as the OEM, the only difference is the charging indicator. This one uses a single LED that flashes when charging and goes solid “on” when fully charged.