The following is a specific introduction to the No. 5 battery and the No. 7 battery:
a.No. 5 battery (AA).
Diameter: about 14mm;Height: about 50mm.
Capacity: Usually between 1800-2800mAh depending on the type of battery (e.g., alkaline, nickel-metal hydride, lithium battery, etc.).
b.No. 7 battery (AAA).
Diameter: about 11mm;Height: Approx. 44mm
Capacity: Usually between 600-1200mAh, also depends on the type of battery.
Obviously, in terms of size, the No. 7 battery is smaller than the No. 5 battery.
Due to the difference in size and capacity, the No. 5 and No. 7 batteries also differ in usage scenarios:
a.Size 5 battery (AA): Due to its large size and capacity, it is typically used in devices that require higher power**, such as digital cameras, flashlights, remote controls, etc.
b.No. 7 battery (AAA): Due to its smaller size, it is usually used in smaller devices such as ***, electronic dictionaries, small toys, etc.
There are various types of No. 5 and No. 7 batteries, including alkaline batteries, nickel-metal hydride batteries, lithium batteries, etc. Different types of batteries also differ in performance:
1.Alkaline batteries: provide a more stable voltage and a moderate level of energy density,** relatively inexpensive, but not rechargeable.
2.NiMH batteries: Rechargeable, with high energy density, but with a high self-discharge rate, they need to be recharged regularly to maintain performance.
3.Lithium batteries: offer the highest energy density and a long service life, but are relatively high.
To sum up, there are differences between No. 5 and No. 7 batteries in terms of size, capacity, usage scenarios, types, and performance. When choosing a battery, it is necessary to choose the appropriate model and specifications according to the actual needs and the requirements of the equipment.