This a LEAD ACID BATTERY set having 4pieces of lead acid batteries, each of the 4pieces have a single capacity of 12v 12ah summing upto a capacity of 48v 12ah for electric motorcycle.This means 4 multiplied by 12v 12ah giving a total voltage of 48v and 12amp hour. Note:Amp hour is not multiplied as its a steady unit unlike the voltage. In summary you will get A box containing 4pieces of batteries (each 12V 12ah) summing up to battery capacity of 48V 12ah.BATTERY CAPACITY IS 48V 12AH.