Features: 5PCS 1S 5A 3.7V li-ion 3BMS PCM battery protection board pcm for 18 650 lithium ion li battery Specifications: Operation parameters: Charging test voltage: 4.25 + / -0.05V Charging: release of the 4.23 + / -0.05V A discharge detection voltage: 2.45 + / - 0.1 V Maximum sustained current: 6 a Over-current detection current: 7.5 A Charging voltage: 4.2 V Product size: 35 * 7.4 * 7.4 MM IC components: DW01 + 8205 * 3 a Main functions: The overcharge protection, discharge protection, short circuit protection, over current protection. Connection details: B + battery positive electrode. B - connect battery cathode. P + enter the anode for battery output P - for battery output input cathode Package Includes: 5PCS*protection board Notes: 1.Transition: 1cm=10mm=0.39inch. 2. 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. 3. Please allow slight manual measurement deviation for the data.