I have an 11.1v LiPo battery that has be working just fine and it recently dropped to 8.3 volts as it normally does during use. However this time when I plugged it into the charger the charger started to blink meaning either the battery is too low to charger or there is a problem with the battery. When I checked the battery's individual cells I made note of their individual charges
- Cell1: 4.15v
- Cell2: 4.15v
- Cell3: 0.0v
How is this even possible? Is my battery toast? It's new and was working fine until this happened.
- This battery has a balance charging connection w 1 blk & 3 red wires to the connector
- I only have only ever used balanced charging for this battery
- This battery has 16 gauge red/back wires connected to a deans connector for use
- I use this battery with a quad copter uav.
- This battery was freshly charged and only lasted ~1 minute the last time it was used
- I was changing pitch/roll/yaw settings on last use and at one point an ESC started causing a motor to be jittery (happens a lot). As I was throttling down/up (4/5 times) to get the motor to spin correctly the low voltage signal kicked in.
- I was using this batter with my quad copter last night when I got the "low voltage" cut off from my ESCs. Instead of charging this battery I charged another battery and left this one sitting on my counter (room temperature) over night.
I just ran a multimeter on each of the wires coming out of the balanced charge connection and here's what I found:
- Wire1(c1): 4.16v
- Wire2(c1+c2): 8.33v (4.16v from cell1 + 4.17v from cell2)
- Wire3(c1+c2+c3): 8.43v (4.16v from cell1 + 4.17v from cell2 + 0.1v from cell3)
Using a suggestion in the comments I was able to get a voltage readout of 41.2mV for cell 3. This extremely low as it close to 3.7V.