yes.. you can use the charger for both but your gonna be two days of chargeing just to drive it!! the chargers are 100mah chargers.. which means they will take 11 hours to do a 1100 mah battery.. the stick packs can be charged at 4 amps (or higher??) but the reciever packs should be charged at 1 amp..
if you have a peak charger that can charge at 1 amp or 4 amps..
1 amp per hour + 1100 milli amp battery (1.1 amps) = 1.1 hours charge time for a completly dead battery.. compaired to 11 hours.
the sticks can be charged at 4 amps. so
4 apm per hour + 1100 (or so) milli amp battery (1.1 amps) = a smidge over 15 min charge time..
a peak will auto detect how much a battery needs to be charged and shut off when its done.. also gives the battery a "cleaner" charge..