DescriptionThis product is a battery equalizer, made of plastic shell material, high-quality and durable. It is used to maintain the balance of the batteries in series connected battery packs. Fine craftsmanship ensures its superior reliability, so you can choose one for you.Features- Color: As Shown. - Material: Plastic (Shell). - Size: Approx. 38.00X7.00X2.50cm/14.93X2.75X0.98in. - Made of high-quality plastic material, this shell is durable and practical for long-lasting use. - It can be used during charging and discharging, and it can balance the battery voltage. - When the voltage difference of the two blocks is lower than 10mV, the battery equalizer starts to work. - It can be used for lead-acid batteries, lithium iron phosphate batteries, nickel-cadmium or nickel-hydrogen batteries. - It can compensate the battery in both directions and can be connected to the battery connected in series for a long time.