The only comment i would modify (for clarity), is that with the initial batches of the Mojo, Chord had no way of knowing just how popular it would be. So chord took the cautious approach, and half charged the Mojos, and then advised new owners that they needed a full 10 hour charge (just in case the Mojos had been on shop shelves for months, and the batteries were flat).
In reality, the initial batches of Mojos were bought by owners, as fast as they arrived at the dealers, so the batteries were still nearly half charged, so most people needed to charge for only say 4 hours.
Mojo is still selling well, so i expect most new owners still only need 4 hours charge to reach full charge.
The only exceptions are probably owners using chargers that change to trickle charge, once the battery gets near full charge.