2x300

2x300 refers to a common size designation for certain types of batteries, specifically two batteries each with a capacity of 300 milliampere-hours (mAh). This notation is frequently encountered in the context of small electronic devices that require a specific voltage and capacity. The "2x" indicates that two individual battery cells are used in conjunction, while "300" signifies their capacity, which is a measure of how much charge the battery can store and deliver. Higher mAh ratings generally mean a longer operating time for the device.

The voltage provided by a 2x300 battery configuration depends on the individual cell type. For example, if the cells are alkaline or zinc-carbon, each typically provides 1.5 volts, resulting in a combined voltage of 3.0 volts. If the cells are NiMH (Nickel-Metal Hydride) or NiCd (Nickel-Cadmium) rechargeable batteries, they usually operate at 1.2 volts each, yielding a total of 2.4 volts. Lithium-ion cells, often used in rechargeable applications, can vary in voltage but commonly are around 3.7 volts, meaning a 2x300 configuration might imply two 1.5-volt lithium cells for a 3.0-volt output, or it could refer to a single higher voltage lithium cell.

Devices that utilize 2x300 batteries are typically low-power electronics such as small flashlights, remote controls, children's toys, and some portable audio devices. The size and shape of the individual 300mAh cells within a 2x300 configuration will also vary depending on the battery chemistry and intended application. Common form factors include AAA or button cells. Understanding this designation helps consumers identify the correct replacement batteries for their electronic gadgets.