Keenso- This 50V 30A lithium battery protection board adopts high quality electronic circuit and integrated components and excellent manufacturing process with reliable quality and excellent performance, which not noly can balance the characteristic of each battery in battery pack and prolong battery life, but also can provide a variety of protection functions including overcharge, overdischarge, short circuit, and temperature protection. Such a practical product with appropriate price, you are worth it! Specification: Battery type: 3.7V ternary cell, lithium manganate cell, lithium cobalt cell Applicable voltage: 50V Charge current: 28A Discharge current: 30A Max continuous working current: 28A Overdischarge protection voltage: 2.6V Overcharge protection voltage: 4.25V Balance voltage: 4.2V Temperature protection: Discharge 75?, charge -7? Weight: Approx. 51g / 1.8oz Package list: 1 * Lithium Battery Protection Board