Parameters ： Taken the battery model: 18650 Taken the single battery voltage: 3.7 V Taken the single battery capacity: 2000 mah U combinations: 3 series and 6 Taken the nominal voltage: 12 V input voltage: 12.6 V output voltage: 8-12.6 V After u combined capacity: 12000 mah (12ah) Taken the battery pack size: 40 *70 * 170 mm 3 *6 size (the default) Taken the overall weight: 0.9Kg Taken the external packing: blue PVC With protection circuit: have overcharge, discharge, over current, short circuit protection function! If you have other need can contact with us , thank you all for the new old customer consultation. 【Battery charging requirements】: 1: the need for lithium-specific charger; constant current constant voltage; 2: Charging voltage: 12.6V 3: Charge current: ≤ 3A Battery discharge requirements: 1: Output 18 line, length 150mm, red and black each one (such as the thickness of the line are required, please consult us) 2: input leads to a 2.1 socket line, length 150mm 3: The maximum instantaneous current: 6A 4: The maximum operating current: 3A 5: the product is built-in battery, the output only two lines, such as output and other requirements can contact us, the above is the default delivery parameters Carefully read the following notes to ensure proper use of the lithium-ion battery. To prevent battery leakage, explosion, fire and so on, please pay attention to the following: - Do not put the battery in water or get wet; -Not located in a heat source (for example, in a fire or heater) near use or battery; Please use the original charger; -Do not reverse the positive and negative electrode; -Do not connect the battery directly to a power outlet or car cigarette lighter; -Do not put the battery in a fire or heat the battery; In order to prohibit the use of wires or other metal objects, a short circuit of the battery, a necklace battery, a pin or other metal objects of transportation or storage will be prohibited; - It is forbidden to beat, throw or make the battery with mechanical vibration; It is prohibited to pierce the battery case with a nail or other sharp objects, prohibit the hammer or the pedal of the battery; Ban-direct welding battery terminal; The battery should be prohibited in any way; Do not charge the battery in case of fire or extreme conditions. - Do not place the battery in a microwave or pressure vessel; - With a battery (for example, batteries) or a different capacity, type, various combination of batteries; - Do not use the battery if smell, fever, deformation, discoloration or any other anomalies; if the battery is being used or charged, it must be immediately removed from electrical appliances or the charger and discontinued use; -The battery should be placed in the reach of children, if the child accidentally turned the battery over immediately should seek medical attention; If the battery is leaking or smelling, it should be removed immediately from a short distance to open; - Electrolyte leakage can cause a fire or explosion; If the battery electrolyte after leakage into the eyes, do not rub, rinse with water, immediately seek medical attention. If not on time, the eyes will hurt. Attention! Do not use the battery in a thermal environment, such as direct sunlight or vehicle heat. Otherwise, the battery will overheat, may burn (lit), which will affect the battery life, reduce battery life. A battery can only be used in the following conditions, otherwise it will reduce battery performance or shorten battery life. In the temperature range, used batteries can cause overheating, fire or explosion. Workspace: Charging: 0 degrees ~ 45 degrees Discharge: -20 ~ 60 degrees C 30 days storage: -20 ~ 45 degrees 90 days storage: -20 ~ 35 degrees When children use the battery, in accordance with the contents of the user manual to teach, and pay special attention to them, to ensure proper use of the battery. If the battery leaks, the electrolyte on the skin or clothing, immediately rinse with water on the affected area, otherwise skin irritation may result. Read the characteristics of the battery device, the correct installation and removal of the battery. If you do not have the equipment for a long time, remove the battery and place it in a cool, dry place, otherwise the battery may rust or work poorly. If battery terminals become dirty, wipe with a dry cloth before use. Otherwise, the battery will be in poor contact, which will lead to loss of energy or will not be able to charge. QualityWe are a professional electric bike battery supplier for AliExpress, we have the perfect manufacturing process and all kinds of scientific management tools for quality control, the battery is brand new and every product you buy from our company has been thoroughly tested before shipping, so we can guarantee quality . ServicesWe are ready to answer any questions about products, regardless of pre-sale or after-sale.We care about the satisfaction of our customers! If you have any questions, please contact us directly or leave us a message, we will reply as soon as possible. ReviewsFeedback will be left timely after reviews. If you have any problems with the purchase, please do not leave neutral feedback negative before contacting us for resolution. We strive to make every transaction a positive experience and will do our best to correct any problem. If you have any questions or suggestions, please contact us before or after making a purchase. We are committed to 100% satisfaction of your needs.