ORIGINAL: OhD
ORIGINAL: nonstoprc
Seems the backup LIPO (one cell in it) can be overcharged if it is continuously charged during flight without a balancer?s
I should have said it is charged during flight if and when the voltage drops below 8.2 volts. At 8.2, no current flows so the pack can never go above 8.2. One cell would have to be below 4.0 for the other to go above 4.2 and into overcharge. If the pack is that unbalanced you better toss it anyway.
Jim O
This requires a careful monitoring of the backup pack to make sure the two cells are balanced "almost" during charging phase. A high quality lipo probably can present the characteristics but it may not be a good idea to trust the backup pack to be that 100% ideal state all the time.
Another thing we need to be careful is the charging current limit (e.g. 1c, or 5c).