Hi Oli, good idea to dedicate a thread to this issue.

I am reposting here my comments on the previous thread:



"One of the lessons learned after Gerardo's L-39 crash, was the dramatic difference between Li-Po and Li-Ion regarding battery voltage versus remaining capacity.

The easiest way to illustrate this point is with the attached chart.

Basically, at the voltage where a Li-Ion still has about 50% of its capacity remaining, a Li-Po is almost totally drained.
This is mandatory to understand, specially if you use both types of batteries.
Checking battery voltage will be useless unless this is fully understood."

Jack