1. This protective circuit board is suitable for 14 series-connected Li-ion cells. 2. Features balanced charging to equalize the characteristics of each battery in the pack, extending battery life. 3. Uses precision integrated circuits for fast and safe charging. 4. Provides overcharge, over-discharge, and short-circuit protection. 5. This product has undergone load and aging tests to ensure quality. Features: 1. Suitable for 14 series-connected Li-ion cells. 2. Balanced charging extends battery life. 3. Precision integrated circuits ensure fast and safe charging. 4. Includes overcharge, over-discharge, and short-circuit protection. 5. Rigorously tested for quality. Specification: Battery Type: 3.7V ternary cell, lithium manganate cell, lithium cobalt cell Discharge Current: 30A Weight: Approx. 73g / 2.6oz Package List: 1 * Lithium Battery Protection Circuit Board