There are two types of AA batteries, one is a rechargeable battery and the other is a disposable battery. The rechargeable battery voltage is 1.25 volts per cell and the disposable alkaline battery voltage is 1.5 volts. per cell.
The dry batteries commonly used in household appliances are AA 5 and AA 7, which are usually 1.5 V. But not entirely. In some special environments, 3V packaging is used, such as batteries in electrical equipment tanks. Some square batteries are still 9V.
There are two main types of AA rechargeable batteries: rechargeable nickel-cadmium batteries and rechargeable nickel-metal hydride batteries. The standard voltage is 1.2V, and the voltage when fully charged can reach 1.5V. AA lithium rechargeable battery. The battery, although not common, has a voltage of 3.2 V and a fully charged voltage of approximately 3.6 V. Lhe capacity of AA rechargeable batteries is generally relatively small, usually several hundred mAh.
Detailed information:
1.5V is the rated voltage of alkaline batteries and 1.2V is the rated voltage of rechargeable batteries. This is the nominal voltage. It can be used to differentiate between rechargeable batteries and disposable batteries, because once the rechargeable battery leaves the charger, the voltage will not be higher than 1.5V. You need to understand why the rated voltage of alkaline batteries is set to 1.5 V. .
If the user sees a rechargeable battery with a nominal value of 1.5V, it must be fake and it is an alkaline battery. The actual discharge range of alkaline batteries is between 0.9V and 1.68V. The voltage drop is linear,direct and the load capacity is very low. It is subjected to a heavy load, that is, the discharge current of a digital camera is. 1000-1300mA.
The voltage will drop quickly and it may even fail to turn on, but the battery is actually charged at that time. This has nothing to do with voltage, but with charge capacity. The charging range of rechargeable batteries is between 1.1V and 1.46V, the voltage drops non-linearly, and a large amount of energy exists between 1.2V and 1.3V, and its charging capacity is much higher than that of alkaline batteries.
High-quality nickel-metal hydride batteries can discharge more than 95% of electricity at a discharge rate of up to 1 C. Special nickel-hydrogen batteries can discharge more than 95% electricity even at a discharge rate of 1C. discharge rate above 5C, which means that the die curveload is flat and has straight load characteristics.
A 2300 mAh nickel-metal hydride battery can work normally with a discharge current of 2300 mA with a discharge rate of 1 C. For a digital camera with a high current discharge d About 1000 mA, discharge rate of only 0.5 C. can discharge 100% of its power. All nickel-metal hydride batteries that are not suitable for high-current discharge in digital cameras are poor-quality batteries with mild characteristics.
The discharge current of most battery devices is small and medium, so it is not a problem to discharge 100% of the power. It is a mistake for some digital cameras to set the voltage too high and the battery capacity cannot be fully discharged. Tianyuan will not provide technical support. It is suspected that the devicesDigital photo cameras with high voltage settings and taking a dozen photos have achieved the unexpected effect of taking thousands of photos with flash using Tianyuan products.
The reason why digital cameras don't take many photos has a lot to do with insufficient charger power and poor battery quality. The general sufficient capacity of chargers on the market is around 20-30%. If a 2000 mAh battery is charged with 400 mAh, it will be more difficult to withstand the discharge current of 1000 to 1300 mAh. The worst chargers only charge 400 mAh. mAh If the battery capacity is less than 5%, it is normal that you cannot take photos.
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No, because it is not universal.
Sizes and voltages are also different. They are not universal and will prevent the machine from functioning normally, if the AA battery is not working. Once the battery is turned on, you. It must be replaced with a battery of the same model, then installed so that the machine can operate normally. Replacing it with another battery will not work and will easily cause a short circuit.
The difference between 10440 lithium battery and AA battery:
1. The length of both batteries is the same, but the diameter of the AA battery is slightly thicker.
2. The capacity of 10440 is only one third of that of AA battery.
3. The tension is different. The voltage of 10440 is twice as high as the voltage of #7.
Knowledge of drums
Generally divided into: No. 1, 2, 3, 5 and No. 7, among which No. 5 and No. 7 are particularly commonly used . the so-called AA battery is battery no. 5, andAAA batteries are AA batteries! Both AA and AAA indicate the battery model.
The standard size of No. 7 is: battery height 43.6 ± 0.5 mm, diameter 10.1 ± 0.2 mm.
The AA batteries we call include dry cells, lithium batteries, nickel-metal hydride batteries and nickel-cadmium batteries. AA batteries commonly used in daily life (such as Nanfu) are alkaline batteries with a voltage of 1.5 V. , No. 7 is about 1300 mAh. Also called LR03.
Capacity of AA and AA batteries: AA batteries are generally greater than 1600 mAh, and AA batteries are generally not greater than 900 mAh.