AA Batteries Lifepo4 40ah Waterproof High Temperature Shell Non Fading Solar Energy Special Lithium Iron Phosphate 12V40Ah. NOTE:24V or more need to customize, please contact us directly. Battery warranty for three years. Can be used around two thousand times. Lithium iron phosphate can work at high temperatures. Generally below 100 degrees. Minus 30 degrees or so, the general temperature is too high or too low will affect the battery life. Lithium iron phosphate battery in the minus 20 degrees temperature only 50-60% of room temperature performance, 40 degrees below the only room temperature performance of 30-40%. 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. 
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