As far as longevity my IB's still have the same cycle numbers as they did in October. IR's raised like 3-4 points but I can live with that.
Runtime and voltage is the same.
People say you have to really take care of IB's.
How hard is it to tray it for a second, then charge, run it, then discharge and let sit ?
At least you dont have to fool with shorting them.
I hated to have to tray each pack until it hit 0.00 before it was safe to short it.