Video:When you test the voltage of this battery, if the positive pole touch the negative pole, the multimeter shows 3V-4V. You need to turn OFF the switch and try again.Description:DC12V 4500mAh Super Rechargeable Portable Lithium Battery EU PlugThis Rechargeable battery is a 12V 4500mah Li-ion Battery and it is specially designed for powering the system device which use 12V DC power. You can use this battery to power our powerful wireless transmitter, CCTV camera and so on. Suitable for your need. Super storage capacity. With working indicator. Specially designed for the system devices which use 12V power. Built-in ON/OFF switch to save power usage. Large mah value means long battery life. Over-charge/discharge protection.Battery Charging Method: Open the battery switch to the "ON" at the red light on the charger indicates when charging starts (if battery is full charge,the power green light will remain unchanged); charging time is generally more than 8 hours; until the plug's red light becomes green, the battery is fully charged.Specification:Size:127*65*23mm(battery)Color: BlueCapacity: 4500mAhBattery type: Rechargeable Li-on battery.Input voltage: 12.6VOutput voltage: 10.8-12.6 DCOutput current:1-2ALine interface specification 5.5 * 2.1 MMProduct life: circulation charge and discharge more than 500 times Scope: can be used for wireless camera, surveillance cameras, wireless infrared detector, car LCD TV, automotive products, locator, medical equipment, electronic products design, LED lamps and lanterns, portable DVD, intercom, digital camera, CD player, MD player, MP3 player, aviation model,ect. which uses 12V power.Note: please turn on the switch when charge for this item.And if you want to measure the voltage,suggest using pointer multimeter.Because digital measure table easily jump table.The lable shows 9800mAh. The real capacity is 4500mAh.Package included:1X 12V 4500mAh Li-ion Battery1X EU plug
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