@Rchawks looking at the specs from DJI it says run time for the RC1 is 4 hours max with fully charged batteries and the RC2 is 3 hours so yes it does have a shorter run time .
@Rchawks yes its mainly because the RC2 has more work to do with the 04 transmission system it uses and it probably means that the built in cooling fan is also running a lot in hot sunny conditions
Same on mine. I get 2 solid 1 hour flight sessions out of mine (6 packs on M4P) off a single RC2 charge. It'll b down to flashing second light by then.