Seem ok came out of balance 3.87 3,76 and 3.80 have used my field balancer and got closer after changing. Let’s see what happens after I use them and recharge. I will update. After using one time balanced perfectly changed fast and I get 7 minutes with my quad 1.5. I will be getting more. Update they work great. I have used Ovonic 1800mah 4s lipo battery for a year and they are still perfect and balanced perfectly. I have bought a few more. Great battery.