Features: *Working Voltage: The active equalizer is designed to be compatible with ternary polymer lithium batteries and lithium iron phosphate batteries, with a working voltage range of 2.7V-4.2V. *Flying Capacitor Transfer Charge: This balancer board utilizes a flying capacitor transfer charge transporter to initiate the balance work, ensuring efficient energy transfer and equalization within the battery pack. It incorporates brand new ultra-low internal resistance and 2OZ copper thickness for optimal performance. *Balance Current and Accuracy: The balancer board provides a balance current of 0-5.5A, with smaller current for better balance. It features a precision balance voltage accuracy of within 5mv. *Under-Voltage Sleep Protection: To safeguard battery health, this active equalizer is equipped with under-voltage sleep protection. It automatically enters a sleep state and consumes less than 0.1mA standby power when the battery voltage of the B1 section drops below 2.7V. *Safety Precautions: Before connecting the balance cable, ensure proper connection and insulation of each section of the battery pack. The board has built-in protection against short-circuiting, but proper insulation is crucial to prevent any damage. Specifications: *Part Name:Battery Active Equalizer *Material:Plastic shell *Size:180*50*20 mm (17s-21s) *Color:As shown Package Content: 1 * Battery Active Equalizer with cable Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. 12V 5A Battery Balancer For Ncm Ternary Polymer Lithium Battery With Active Made of high quality material, durable and practical to use. Perfect functions,give you a wonderful experience. Every customer can enjoy 30 days refund or replacement for Damaged/Quality Issues. If you have any questions, please feel free to contact us, we will solve it for you.