It is bottom 4 pins connection. The discharging positive (+) is on the key and charging socket side, please make sure the polarity is not reversed from your old battery before purchasing.
The size is 39cm11cm7.5cm(Length x width x hight), please make sure this size can be installed to your bike. Please mind the the red wire is positive +, the black wire is negative. Rated Voltage / capacity: 48V / 13Ah. L390W110H75 (inch):L154W43.5H29.5. Discharge cycle life:1000 times.Charging time :Standard 0.2C5A×5hrs. Charging time:Quick 0.5C5A×2hrs. Fuse:Installation position:Inside on the PCB.
PCB board Protection:Over charge, over discharge, over load and short circuit. BMS board Protection:BMS is used to supervise battery by measure its.Voltage, temperature, current and SOC (State Of Charge), give out alarm. Under wrong circumstance, cut off electric power link in severe. Situation in order to protect battery and make its life longer. Balance energy among batteries to make them more identical and expand. 1 x Lithium Battery (cannon port)with Aluminum case(base discharge).
This item is in the category "Sporting Goods\Cycling\Bike Components & Parts\Electric Bike Components". The seller is "qnsports" and is located in this country: GB. This item can be shipped to United Kingdom.