11.1V 7000mAh Lithium Ion Rechargeable Battery

It's a 11.1V 7000mAh Lithium Ion Rechargeable Battery. Lithium-ion rechargeable batteries, often referred to as Li-ion batteries, are a popular type of rechargeable battery used in a wide range of electronic devices.  Lithium-ion batteries have a high energy density, which means they can store a significant amount of energy in  a relatively small and lightweight package. This makes them ideal for portable electronic devices where size and weight are important factors. Lithium-ion batteries typically have a nominal voltage of 3.6 to 3.7 volts per cell. Multiple cells are often connected in series to achieve higher voltages required by different devices. For example, a battery with three cells in series would have a nominal voltage of around 10.8 to 11.1 volts.