HKN 7.4V 4000mAh Lithium Solar Battery  (7.4 V)

About this item ?TRUE CAPACITY?7.4V 4000mAh(+15%) rechargeable li-ion battery has undergone rigorous capacity testing (+15%), which absolutely guarantees that the capacity is real and not false, and supports capacity testing. Allows you to enjoy longer use time, experience longer working time, and make your money more valuable. ?KNOW BEFORE USE?7.4V li-ion battery is suitable for 7.4V~8.4V equipment. For example, Bluetooth speakers, solar outdoor lights, solar cameras, dental lights, etc. After receiving the battery, check whether the position of the red (+) and black (-) wires of the plug is consistent with the old battery. In different positions, you need to adjust the position. If the plug size is different, you can replace the connector by yourself. ?SIZE & DURABILITY?Size: 2.68*1.46*0.1.46 Inch(68*37*37mm). Please Check the battery size and connector type.7.4V 4000mAh rechargeable high capacity li-ion battery pack. Compared with NIMH, it can maintain 70% of the capacity for 1000 cycles of charging and extend the cycle life by 50%. ?QUALITY ASSURANCE?The 7.4V 4000mAh(+15%) rechargeable li-ion battery strictly controls the consistency of voltage, internal resistance(20m?) and capacity to ensure the super stability and durability of the product, longer discharge time and more cycles. After 1000 cycles of normal charge and discharge, it can maintain more than 70% capacity. ?BUY WITH CONFIDENCE?The product conforms to Amazon's after-sales service policy, after-sales support 3 months warranty service, I believe you have more confidence in our batteries. If you have any questions about the use of the product, please contact us in time, we will reply to you within 24 hours. Thank you very much.