​Rechargeable NiMH batteries typically have a rated voltage of 1.2V, which is determined by their nickel-metal hydride chemistry. The positive electrode of a NiMH battery uses nickel hydroxide, and the negative electrode uses a hydrogen storage alloy. During the charge and discharge process, hydrogen ions migrate between the positive and negative electrodes, generating a stable voltage plateau of 1.2V. This voltage is slightly lower than that of disposable alkaline batteries, but NiMH batteries can be used for a long time through cyclic charge and discharge.

To ensure optimal performance and safety when using alkaline batteries, please note the following:

Check device performance: If you notice a decline in performance in a device using alkaline batteries, such as a sluggish remote control or dim flashlight, this may indicate low battery charge and you should consider replacing the batteries.

When temperatures exceed 40°C, the internal chemical reactions of alkaline batteries accelerate, leading to increased self-discharge and a rapid decrease in charge.

Common battery recycling methods include secondary use, disassembly and recycling, recycling, landfill, and incineration.