Seriously, you're better off living with it.

The good news is that the 15hr thing is only the first charge. That's what is called a "forming charge". A long slow charge is really good for Nicad and Nimh batteries.

After the first couple of cycles, you can charge at a faster rate with any number of chargers out there.

But most guys just pop the plane on the charger the night before going flying. That should give you 8-10hrs of charge, and that's enough for a pack that isn't totally flat to be ready to fly. And the charge will last through 3-5 flights, which is pretty much a "day" for most guys.

If you insist on going with a Li-based battery, you'll need more than just a battery, you'll need a regulator as well. Li batteries just don't come in the correct voltages for our recever packs. You want something in the range of 4.8-6volts. Anything over 6-and-change can cause problems with servos and receviers. A 2 cell lipo is too much voltage, a 1 cell is not enough.