No. If the batteries are nearly completely drained, it will take at least 16 hours to fully recharge with a C10 charger. (The one that came with the radio.) You'd be better off leaving it for 24 hours in my opinion.

The C10 charge rate on our wallwart chargers is usually about 50 mA. Most transmitter packs are 600 mAH packs. So theoretically, 600 mA's divided by 50 mA's per hour = 12 hours. But with the losses due to the cells heating, or for inconsistencies in chargers, the minimum recommended charge time is generally 16 hours.
Dennis-