AA Battery vs. AB Battery

Attribute	AA Battery	AB Battery
Size	50.5 mm x 14.5 mm	50.5 mm x 14.5 mm
Chemistry	Alkaline	Lithium
Voltage	1.5V	3.7V
Capacity	1000-2900 mAh	1500-3500 mAh
Usage	Common in household devices	Common in high-drain devices

Size and Shape

AA batteries are cylindrical in shape and measure about 50.5 mm in length and 14.5 mm in diameter. They are one of the most commonly used battery sizes and are found in a wide range of devices, from remote controls to toys. On the other hand, AB batteries are also cylindrical but are slightly larger than AA batteries, measuring about 61.5 mm in length and 15.5 mm in diameter. This difference in size means that AB batteries may not fit in devices designed for AA batteries.

Capacity

When it comes to capacity, AA batteries typically have a capacity of around 2000-3000 mAh (milliampere-hours). This means they can provide power for a longer period of time compared to smaller batteries like AAA. AB batteries, on the other hand, have a higher capacity than AA batteries, usually ranging from 3000-4000 mAh. This higher capacity makes AB batteries suitable for devices that require more power, such as digital cameras or high-drain devices.

Voltage

Both AA and AB batteries are typically rated at 1.5 volts, which is the standard voltage for most alkaline batteries. This voltage is sufficient for powering a wide range of devices, from small electronics to larger appliances. However, it is important to note that some devices may require a higher voltage, in which case a different type of battery would be needed.

Chemistry

AA batteries are commonly available in alkaline, lithium, and rechargeable nickel-metal hydride (NiMH) chemistries. Alkaline batteries are the most common type and are suitable for low-drain devices. Lithium batteries offer a longer shelf life and better performance in extreme temperatures. Rechargeable NiMH batteries can be reused multiple times, making them a more eco-friendly option. AB batteries, on the other hand, are typically only available in alkaline chemistry, which limits their versatility compared to AA batteries.

Cost

AA batteries are widely available and come in a variety of brands and price points. They are generally more affordable than larger batteries like C or D cells, making them a popular choice for everyday devices. AB batteries, on the other hand, are less common and may be more expensive than AA batteries due to their larger size and higher capacity. This can make them a less cost-effective option for some consumers.

Compatibility

One of the key differences between AA and AB batteries is their compatibility with devices. AA batteries are used in a wide range of devices, from small electronics to household items. Their standard size and voltage make them a versatile option for many applications. AB batteries, on the other hand, are less commonly used and may not be compatible with as many devices. Their larger size may also limit their use in certain devices that are designed specifically for AA batteries.

Conclusion

In conclusion, AA and AB batteries have several differences in terms of size, capacity, chemistry, cost, and compatibility. AA batteries are smaller and more versatile, making them a popular choice for everyday devices. AB batteries, on the other hand, offer higher capacity but are less common and may be more expensive. Ultimately, the choice between AA and AB batteries will depend on the specific requirements of the device being powered.