This is actually the result of two 3.6 (3.7) V batteries connected in series. The actual voltage is 7.2V.
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 number. 5, and the AAA battery is battery No. 7. Both AA and AAA indicate the battery model. The specific models are as follows:
1. D type battery (large battery/LR20/AM1) diameter ф34.2 height 61.5mm;
2. Type C battery (AA/LR14/AM2 battery) diameter ф26.2; height 50.0 mm.
3. AA battery (AA/LR6/AM3 battery) diameter ф14.5 height 50.5 mm.
4. AAA battery (AAA/LR03/AM4 battery) diameter ф10.5; height 44.5mm.
5. Battery type AA/2 (8th battery LR1/AM5) diameter ф11.0 height 30.0 mm.
6. AAAA battery (AA/LR61/AM6 battery) diameter ф8.0; height 39.5mm.
7. Battery type AAAA/2 (small battery AA/LR61/AM6) diameter ф8.0 height 28.0 mm.
InformationDetailed instructions:
1. Dry battery
Dry battery is also called manganese-zinc battery. The so-called dry battery is relative to the voltaic battery, and the so-called. called manganese-zinc refers to its raw material. For dry cell batteries made from other materials such as silver oxide batteries and nickel cadmium batteries. The manganese-zinc battery voltage is 15V. Dry batteries consume chemical raw materials to generate electrical energy. Its voltage is not high and the direct current it can produce cannot exceed 1 ampere.
2. Lead acid battery
The battery is one of the most used batteries. Use a glass or plastic tank, fill it with sulfuric acid, and insert two lead plates, one is connected to the positive electrode of the charger, and the other is connected to the positive electrodee negative of the charger. , a battery is formed. There are 2 volts between its positive and negative terminals. The advantage of batteries is that they can be used repeatedly.
In addition, as its internal resistance is extremely low, it can provide significant current. Use it to power the car engine, and the instantaneous current can reach more than 20 amps. The battery stores electrical energy when charging and converts chemical energy into electrical energy when discharging. ?
3. Lithium battery
Battery with lithium as negative electrode. This is a new type of high-energy battery developed after the 1960s. According to the different electrolytes used, they are divided into: high temperature molten salt lithium batteries, organic electrolyte lithium batteries, lithium batteries with inorganic non-aqueous electrolyte, lithium batteries with solid electrolyte, lithium batteries.water battery.
Reference materials:
Directly connect the rectifier diode in series to reduce the voltage. A series-connected silicon rectifier diode can reduce the voltage by 0.6V, so the input servo operating voltage is 6.8V because the output power amplifier transistor voltage on the The servo's circuit board still has a voltage drop (around 0.7). , then the second servo motor. The maximum operating voltage of the terminal is actually 6.1V. In addition, the rated operating voltage of SG90 is: 4.8V-6V, not about 6.5V.