Lowest "Safe" voltage for 2s?

[Bondonutz]

High qaulity packs, Hyperion, ThunderPower etc (excludeing MA) will come back just fine if cut off is at 3.0 per cell but still should be set at 3.1-3.2

The cheaper packs IE HobbyCity, Blue Lipos, Batman etc I would use a consevative cut off of 3.4-3.5 to be safe. These packs seem to really struggle getting back to where they need to be when drawn down to low.