“Cell voltage checked 3.8, 3.83, 3.81 as recieved. Charged on Hitek quad 4 on 1C balance charge. Charger went full and off charge at 4.19, 4.20 & 4.20. Same readings at the field. Installed in Ultimate2 and 3 mins in air and motor shut down. Landed OK, battery was puffed, hot, & cells measured 2.73, 3.75 and 3.71. Recharge on balance 1C and cells all came up to 4.19-4.20v. Don't' trust it now.”
