This Battery 48V 36V Down Tube Battery and and smart 2A battery charge for 200-1500W Motor, Electric Bicycle Lithium-Ion Battery are equipped with intelligent 30A BMS protection boards and 4-pins base, which can provide multiple protections for the batteries, such as overcharge, overdischarge, overvoltage, overcurrent, short-circuit, temperature, and so on .The XT60 discharge plug ensures a secure connection to your motor, while the bottom bracket set includes a compatible bike type for your convenience.Lithium batteries are not suitable for long-term empty storage. Please charge the battery to more than 50% for storage and recharge the battery every 30 days .