BSL1225M BSL1240M BSL1830C BSL1850C 2.5Ah 4.0Ah 3.0Ah 5.0Ah 12V 12V UC12SL 37 min 60 min - - - - - - - - - - - - - - - 30 min 32 min 38 min UC18YTSL - - - - - - 30 min 32 min 38 min UC18YTSL 8