it will run on 2.4v mine dose

AAs in adapters will work OK how long it runs will depend on the mAh of the battery
if you are in the UK ALDI stores do rechargeable-AA and C for a few quid or you could go for 2x 18500 li-ion = 7.4v + charger you'd need to get these on the net KDs or DX are the best known
the ALDI C-cell are rated at 4000mAh each = 2,4v for 2 i will do a run time test on two of these tomorrow and let you know the run time
3 of these in my 2-D mag was over 2 hours continuous
i have know bought 8 of these fusion 36
some are for XMAS for the 2-D mags i gave my nephews last year