RE: Discharged Li-Po
Hmm, original "conventional wisdom" on LiPoly packs was a 2.5 Volt per cell cutoff. That eventually became the "drop dead" point, and that's not to say that the pack would recover with 100% of its capacity and capability after being drawn down that far.
I agree, most automatic chargers won't even touch packs that are below 9.0 Volts, let alone 8.25 Volts.