Shipping list: 1pcs 12V Rechargeable Battery 3000mAh(3Ah), Built-in BMS board [Product specification] Battery Model: 12V 3Ah Rated voltage: 12V Rated capacity: 3000mAh Cell size: 18650 3000mAh Cell Combination: 3S1P Cell Quantity (parallel*series): 3 pcs Discharge Cutoff Voltage: 8.25+/- 1V Charge Cutoff Voltage: 12.6V Continuous discharge current: 5A Maximum Pulse discharge current: 10A The maximum charge current: 3A Weight: 138g Battery size: 68 * 40 * 40mm The battery pack automatically protects the system, the battery overcharge, over discharge, over current, and external short circuit for effective protection. Application: The battery used in loudspeakers, attendance machine, wireless monitoring equipment, medical equipment, instrumentation, LED lighting, traffic signs, portable small household appliances, electric tools, toys and so on. Battery Use Tips: 1, long-term use of loudspeakers or other equipment, you need to remove the battery. 2, the battery in the case of live storage, storage time of more than three months, the best time to charge the battery after storage, you can extend the battery life, and can effectively prevent the battery capacity irreversible attenuation. 3, the battery over discharge protection: as long as the plug in the charger, the protection can be solved. 4, the battery overcharge protection: as long as connected to the machine, began to use, protection can be solved. 5, the battery over-current or short circuit protection: the load removed, the protection can be solved. 6, when using a multimeter to measure the battery voltage is 0, please confirm that no 3,4 protection occurred before they can be identified as a battery failure.