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What's the difference between a AA battery and a AA battery? Battery size, battery weight, battery resistance, battery capacity? The simplest is to distinguish from the battery code, so what if you put the three types of batteries together.
1. Mix the number 5 rechargeable battery, the number 7 rechargeable battery, and the 18650 lithium-ion battery together, as shown below. The smallest is the number 7 battery, and the medium is the number 5 battery, the highest is the 18650 lithium-ion battery, and the smartest person in the world can blink and find his seat.
Battery voltage and identification method:
1. The AA mark on the surface of the battery represents a AA battery, and the AAA mark represents a AA battery. 2, if the 18650 battery surface generally have a direct spurt code mark. The maximum voltage of the No. 3, No. 5 and No. 7 batteries is 1.5 V, and the maximum voltage of the 18650 Battery is 4.2 V.
Third, the battery size distinction method, may use the caliper to measure:
1. The diameter of rechargeable battery no. 5 is 14mm and the height is 49.2 mm. The diameter and height of No. 2 and No. 7 rechargeable batteries are 10.1 mm and 43.5 mm respectively. 3. The diameter of 18650 lithium battery is 18mm, the height is 65.2 mm.
Resistance testing and volumetric testing are generally not recommended:
1. The internal resistance of the battery varies with capacity. The capacity of No. 2 and No. 5 batteries ranges from 500mAh to 2500mAh, and the capacity distribution is wide. 3. The capacity ranges from 1200mAh to 2800mAh, and the difference of capacity distribution is large.
The weight of battery can be distinguished as follows:
1. The normal No. 5 rechargeable battery weighs about 28g. The photo below shows the AA1200MAH high-temperature battery weighing 26g. 2. A normal rechargeable no 7 battery weighs about 14g, while a bare-body battery weighs 13g, as shown below. 3. The normal 18650 lithium-ion battery weighs about 44g. The INR18650N2000mAh power cell is measured as follows.
