A 3.7v 2000mah li-ion battery with dimensions of 45mm x 70mm is a compact and relatively high-capacity battery suitable for powering small to medium-sized electronic devices. Let’s break down its description:

1. Voltage: The battery has a nominal voltage of 3.7 volts (V). This is the average voltage that the battery provides during its discharge cycle. It’s important to note that the actual voltage can fluctuate slightly depending on the charge level.
2. Capacity: The battery has a capacity of 7.4 watt-hours (Wh). Capacity represents the total amount of energy the battery can store and deliver. In this case, the battery can theoretically provide 7.4 watts of power for one hour.
   Lithium-ion: Lithium-ion batteries are a type of rechargeable battery commonly used in various electronic devices due to their high energy density, lightweight, and ability to hold a charge over a relatively long period.
3. Dimensions: The battery has physical dimensions of 45mm x 70mm. These dimensions indicate the length and width of the battery, respectively. Unfortunately, the given information doesn’t include the thickness (height) of the battery, which is essential in determining its overall size and capacity.

Based on the provided information, we can infer that this battery is likely suitable for smaller electronic devices that require a compact power source with a decent capacity. Common applications for such a battery could include smartphones, portable media players, Bluetooth earphones, small IoT devices, and other gadgets that need a reliable power supply in a compact form factor.

Package include:
1 x 3.7v 2000mah li-ion battery 45mmx70mm