Originally Posted by
SteveyJ
Hi guys,
This is my first post so go easy!
I've just recently gotten back into RC with my RC18MT. Now I've just done a brushless conversion on it and in doing so have changed to LIiPo power!
I have the Trackstar 6100kv Brushless power system from hobbyking, and the Turnigy 2200mah 2S 20C battery (i actually have 2 of these).
Upon receiving the batteries, i balance charged the first using an Imax B6 charger, charged at 2A.
I then ran the battery in the car for between 5-15 mins (till my lunch break was over!) then switched the car off and put it away. I then had another little go (approx only 5 mins as TX started bleeping low battery) once i got home, i then switched it off and put it away. (did leave the battery plugged in though) Overall i was VERY impressed with the performance, having never seen a brushless/LiPo set up before!
Got the car out yesterday (2 days later) put some fresh batteries in the TX and tried to switch it on and nothing really happened, So I am now running a balance charge on my pack, but it is showing one cell as 4.2V and the other is at 1.3V (30 minutes later its at 1.86V)
The pack has also "Puffed" on one side.
So I'm thinking I've probably goosed the pack by leaving it stored at an incorrect voltage?
I'd really appreciate any advice before i use my other pack so i don't destroy that one too!
Yeah it's junk. It will never be the same. Being a new battery, I assume one cell dropped faster than the other, ending up way low. I always cycle my batteries 3 times before I treat them as brokein.
Not to start a flame war, but all the reading I have done, indicates that the chemical has to create optimal crystal size in the cells chemical for optimal life and performance. And that once a cell goes down too far, the crystals grow too large and can puncture the cell membrane/ wrapping. A bad day/ lipo fire.
As a side note, some guys claim to be able to "shatter" the crystals, saving the battery by surging them with varying amounts of voltage, BUT frankly, to me that is playing with fire, literally. I
highly frown on that endeavour.
Just toss it, approved disposal, make sure to break the new one in, and always disconnect when done.