Electric Bike Battery use Samsung 2900MAH cell 48V 21AH Lithium Battery High Power 750W Rear Rack Battery with BMS 2A Charger

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Brand Name ETARIO

Capacity 21 - 30Ah

Voltage 48v

Type Lithium Battery

model H4821

Rated Capacity 21000(mah)

Custom processing Y

Standard voltage 48(V)

recharging current 2(A)

Dimensions 450*140*70mm

Applicable Type electric bicycle,Electric cars, lithium cars,Modified mountain bike

certified product CE

type of battery Power Battery

Fit for motor 750W 500W 350W 250W

Electric Bike Battery use Samsung 2900MAH cell 48V 21AH Lithium Battery High Power 750W Rear Rack Battery with BMS 2A Charger. Keep in storage - in order to maintain the capacity of the battery, the battery and battery pack are advised to store the -20~35, low humidity, and no corrosive gas. - batteries are avoided in high temperature or high humidity storage, otherwise will lead to battery leakage, rust, and capacity is lower. - long term storage will lead to a decrease in the capacity of the battery and the battery pack, and the maximum discharge capacity can be achieved after the 1-3 charge / discharge cycle is required. - after three months, the battery should be charged and discharged. Warning: - do not allow reverse charge, should be the battery according to the polarity of the correct connection, not to reverse. - do not allow short circuit, otherwise it will cause permanent damage. - the battery can not be used under extreme conditions, such as: the limit temperature, the depth of the cycle, the extreme over charge and over discharge. - store batteries in a cool, dry place, if a large number of batteries are stored or shipped. - do not directly on the battery solder. - if the battery is noisy, high temperature, leakage and other abnormal situation, please stop using the. - do not put in the fire or attempt to disassemble, the battery may burn or produce harmful substances. - do not allow the use of the old battery or half of the battery with a new battery, otherwise it will produce a discharge. - do not cut off the shell and remove the battery's jacket tube. - don't allow the battery to be put in the water. Note: - the battery should be charged before use. - charging method according to technical specifications of our. - use the charger to charge. - the battery should be avoided in the use of sealing, should provide the corresponding ventilation device, otherwise the battery may produce hydrogen, in the case of a point of ignition will cause explosion. - don't try to battery separation or bear extrusion and collision, may lead to battery fever, furious, spilled alkaline electrolyte will damage skin and eyes can also eat clothes. - should keep the battery away from the child, if swallowed, contact the doctor immediately. When the battery is not used, it should be removed from the equipment. - when the first use of a new battery or long-term storage use, the use of electricity before. - do not touch the battery when it is hot, until it cools down. - when the battery is used, the device should be turned off when the energy is used to avoid over discharge. - pull out the battery pack, should hold the battery terminal and can not hold the line. - after the battery is used, if the battery is hot, it can be placed in the place where the air is not directly in the place of the ventilation and no direct sunlight. Quality We are professional Electric bike battery supplier on aliexpress, We have perfect production process and all kinds of scientific management tools to control the quality,The battery is brand new and every single item you buy from our company has been compeletly tested before shipping , so we can guarantee the quality. Service We are willing to answer any questions about the products no matter Pre sale or after sale. We care about our customer satisfaction! If you have any question,pls contact us directly or leave us message,we will reply as soon as possible. Refund When you received the item, please check the quality and quantity in time. if there is any problem in 7days,Feedback the reason where it gets wrong to us. we will resolve it as soon as posiable,If the products still can't work,We will send new replacement or refund once the item is received. Feedback Feedback will be left in a timely manner after feedback has been received. Should there be any problems with your purchase, please do not leave neutral or negative feedback before contacting us for resolution. We strive to make every transaction a positive experience and will do everything possible to correct any problem. Please don't hesitate to contact us if you have any questions or concerns before or after your purchase. We are committed to your 100% satisfaction.