The 40C comes standard with an AC output for lighting (only). There is available (from any dealer, including me) 346761602M RECTIFIER KIT 8B THRU 40C $99.78 if you need to charge batteries.
Depends on the battery and the radio. Impossible to know for sure without more information. (That's like asking how many glasses of water you can get from a water tank. ;-) But you can always pull start the 40C ...