Battery Equalizer Introduce: In battery packs connected in series, due to the difference in the chemical composition and temperature of the battery cells, the voltage of each battery be different during the charging or discharging of the battery. As the charge and discharge process is repeated, this difference gradually increase, eventually leading to premature battery failure. Extended service life. Reduce battery replacement. Maintain charge balance. Save extra money. Insulation element.<br><br>NOTE: 1. Two batteries must be ofthe same type. The capacity orthe old of the battery is different, which affectthe effect ofthe battery equalizer. 2. Each equalizer corresponds to two batteries. 3. Multiple battery equalizerscan be usedin parallel to solve the voltage balance of multiple batteries in the battery pack. Intheory, countlessbatteries can be connectedin parallel. Model No:KBX102s LCD Display:Yes Rated Voltage Scope:7-18V Optimizing Current:0-10A Quiescent Current:10mA Connection method:Parallel Connect or Series Connect Multi-module parallel connection:Support Product Size:85x75x30mm Product Welght:160g Due to different product batches, the appearance , which does not affect the use. Colour:Black Material:Plastic<br><br>Package Contents: 1 * Battery Equalizer<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.