<p>1. Scope of power application: massager battery pack, LED lamp backup power supply, 12V electronic products, solar street lamp battery pack, monitoring backup power supply, and other products.</p> <p>2. Note: For products with a current above 3A, the battery discharge rate must be above 3C.</p> <p>3. The calculation formula of the rate: 1C rate battery, 2000 capacity is equal to 2AH*1=2A working current.</p> <p>4. 3C rate battery, 2000 capacity is equal to 2AH*3=6A working current.</p> <p>5. The battery will heat up during use, which means that the battery rate is . In this case, the battery cannot be used for a long time and the battery will be damaged quickly.</p> <p>Note 1: Wiring 0V (B-), 3.7V (B1), 7.4V (B2), 11.1V (B+) strictly according to the diagram, do not short-circuit intentionally!</p> <p>2: After is connected, it needs to be before output.</p> <p>3: When connecting 3 groups of batteries in series, please that the voltage of each group of batteries is the same. If they are not the same, please charge each group of batteries separately and use them in series. During the discharge test, the battery with the fastest voltage drop is the poor battery.</p> <p>Explain: Don't mix good batteries and bad batteries together! The closer the capacity\/internal resistance of the 3 groups of batteries, the better! (2 good batteries + 1 bad battery use effect = 3 bad batteries use effect).</p> <p>Product name: Lithium battery protection board</p> <p>Model: -3S-FL25A-A</p> <p>Overcharge voltage range: 4.25-4.35v0.05v</p> <p>Over-discharge voltage range: 2.3-3.0v0.05v</p> <p>Maximum operating current: 20-25A (pay attention to heat dissipation)</p> <p>Upper limit instantaneous current: 35-40A</p> <p>Quiescent current: less than 30uA</p> <p>Effective life: more than 30000 hours</p> <p>Internal resistance: less than 100m</p> <p>Short-circuit protection: can be protected, delayed self-recovery.</p> <p>Balance current: 45 mA</p> <p>Charging voltage: 12.6V-13V</p> <p>size:56 x 45 x 4.0mm</p> <p>Material:PCB+metal</p> <p>colour:green</p> <p>Package Contents:</p> <p>2 x Lithium battery protection board</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light 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.</p>