1.2V rechargeable batteries usually refer to NiMH batteries or nickel-cadmium batteries, which are common rechargeable batteries on the market. Nickel-metal hydride rechargeable batteries can replace 1.5V dry batteries (such as alkaline batteries) in some cases, such as some electrical appliances that do not require very high voltage. But the following points need to be noted:
Voltage difference
1.2V vs 1.5V: The nominal voltage of 1.2V rechargeable batteries is lower than that of 1.5V dry batteries. Although many devices can operate at lower voltages, some voltage-sensitive devices may experience performance degradation or may not work properly.
Device compatibility
Low-power devices such as remote controls and clocks are usually compatible with 1.2V rechargeable batteries. However, high-power devices such as microphones, digital cameras, toys, and power tools may require higher voltages, and using 1.2V rechargeable batteries may result in insufficient performance.
Capacity and battery life
1.2V rechargeable batteries usually have a higher capacity (measured in mAh). Although the voltage is lower, the high capacity can make up for the voltage difference to a certain extent. However, its battery life is also affected by the voltage requirements of the electrical appliances. NiMH batteries usually cannot be fully discharged, resulting in a shorter service life.
Charging and recycling
1.2V rechargeable batteries can be recharged repeatedly, which is more economical and environmentally friendly than alkaline batteries. Moreover, NiMH batteries can usually be recharged hundreds of times, and the long-term use cost is low.
Precautions
Device manual: Before using 1.2V rechargeable batteries, it is recommended to check the device manual to confirm whether the device supports lower voltages.
Initial voltage: The initial voltage of a 1.2V rechargeable battery may be close to 1.5V when fully charged, but it will gradually decrease with use.
Conclusion
1.2V rechargeable batteries can replace 1.5V dry batteries in many cases, especially in low-power devices. However, for high-power or voltage-sensitive devices, it may be necessary to use them with caution or choose rechargeable batteries that are closer to the voltage of dry batteries (such as zinc-nickel rechargeable batteries). Before use, it is recommended to confirm the compatibility of the device and choose the appropriate battery type according to specific needs.
