Tired of replacing lead acid batteries?  This lithium ion battery has nearly double the runtime, fits the stock battery tray and is protected from overcharge/undercharge so it will last.  Razor adapter directly plugs into your factory razor harness.  Charging times are half of stock razor (4hrs).
 
•FITS RAZOR MX500/650, SX650, RSF650.  REQUIRES STRAIGHTENING OF ONE TRAY END.
•36V LITHIUM ION BATTERY
•40A CONTINUOUS DISCHARGE
•100A MAX DISCHARGE (1 SECOND)
•3,600+ MAX WATTS
•L X W X H ~ 8.5 X 3.6 X 5.5"
•5A CHARGER INCLUDED
•10A MAX CHARGE CAMPATIBILITY
•EVE 40P CELL
•JBD BMS WITH BLUETOOTH (XiaoxiangBMS App)
•XT90/10AWG DISCHARGE PORT W/RAZOR ADAPTER
•XT60/14AWG CHARGE PORT
•COMPLETE BATTERY PROTECTION
•FREE SHIPPING (LOWER 48 STATES ONLY) NO SHIPPING TO HAWAII
•ORDERS TYPICALLY DELIVER IN 5 DAYS FROM TIME OF PAYMENT
•IMPORTED