Tired of replacing lead acid batteries?  This lithium ion battery has more than double the runtime, fits the stock battery tray and is protected from overcharge/undercharge so it will last.  Optional adapter available for direct plug into your factory razor harness.  Charging times are half of stock razor (4hrs).
 
•25.2V LITHIUM ION BATTERY
•40A CONTINUOUS DISCHARGE
•60A MAX DISCHARGE (1 SECOND)
•1,440+ MAX WATTS
•L X W X H ~ 6 X 3.1 X 4.8"
•3A CHARGER INCLUDED
•5A MAX CHARGE CAMPATIBILITY
•EVE 21700 CELLS (15mΩ@1kHz)
•XT90/10AWG DISCHARGE PORT W/MATING PIGTAIL
•XT60/14AWG CHARGE PORT
•COMPLETE BATTERY PROTECTION
•FITS RAZOR MX350 and others with side-by-side 12v7ah lead acid.
•FREE SHIPPING (LOWER 48 STATES ONLY) NO SHIPPING TO HAWAII
•ORDERS TYPICALLY DELIVER IN 5 DAYS FROM TIME OF PAYMENT
•IMPORTED