Thank you. We are monitoring the batteries and we have ThunderSky Lithium batteries. I was trying to determine the range but there is a hill about 1/4 mile log to get to my neighborhood. The pack is a nominal 144V and I was 115V at the bottom of the hill. Half way up the pack voltage dropped to 80V and I has gone into 1st gear and was doing 20 in a 40 MPH zone. I was amazed at such a sudden drop off. I pulled off as soon as I could and charged for 30 minutes but it seems by then 3 or possbly 4 of my 48 cells were damaged.