EBL USB Rechargeable 9V 5400mWh Li-ion Batteries Ahout EBL EBL, since 1998, professional on batteries and chargers more than 26 years. EBL always persistently providing high quality and services for everyone. Package: 9V lithium battery x 4 4 in 1 charging cable x 1 Manual User x 1 Directly Charging by Micro USB - 9V Lithium Batteries Easy and convenient to charge anywhere directly by Micro USB cable. You can charge all of four batteries with provided four-port cord at the same time. Ideal for everyday use, especially the devices with constant energy demands, perfectly use for smoke detectors. Tips for 9V li-ion rechargeable batteries: The standard voltage of All brands' 9V lithium-ion rechargeable batteries are 8.2V-8.4V. Specification： Capacity: 5400mWh Recycle time: up to 1200 times Charging Time: about 2 Hours High Capacity & Long Lasting The Lithium batteries is lighter but have a larger capacity than Ni-MH rechargeable batteries, 5400mWh high capacity could support a longer working time for your devices. 1200 Cycles Time Recharge up to 1200 cycles, the lithium batteries not contain Hg / Cd / Pb harmful metal substances. Perfectly replace of dry battery and ordinary rechargeable battery. Steady Voltage Keep steady voltage until the whole cell is depleted, makes the devices work more stable. The advantage of lithium battery is no memory effects, you can charge the battery anytime whatever fully or partially drained. USB Charging Port Unique design with a micro-USB port in the side of the battery, it can be directly recharged by plug in a USB port like laptops, power bank, wall adapter, etc. Easy and convenient to charge anywhere and anytime. Widely Used 9V Battery Standard 9V rechargeable battery, can work perfectly with the smoke detector, flashlights, portable radios, walkie-talkie, alarm clocks, microphone, cameras, toy remotes, etc. Multiple Safe Protection Supports over-charged, over-discharged, over-voltage, over-current and short circuit protection, ensures complete safety for you and your devices.