Assume that the batteries in the flashlight are rechargeable. What energy conversion would have to take place in order to recharge the batteries?

is it electrical to chemical energy?

batteries convert chemical energy to electrical energy

in rechargeable ones, the process can be reversed

Batteries in a flashlight converting chemical energy into light

Yes

Yes, the energy conversion that would have to take place in order to recharge the batteries in the flashlight is from electrical energy to chemical energy.