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Alkaline disposable batteries are non-rechargeable and usually the least expensive option. They provide a one-time use, but you are able to get a short burst of power that can last for several shaves. Nickel-cadmium (NiCd) batteries are rechargeable and considered the preferred choice of many shaver users. They provide a longer life than alkaline batteries and come with a higher price tag.
Nickel-metal hydride (NiMH) rechargeable batteries are lightweight and offer more power than NiCD, but they have a shorter lifespan. Lithium-ion (Li-Ion) batteries are still the most popular choice for electric razors as they provide the longest power life. They also feature an indicator light to alert you when it is time to recharge and contain no memory effect that can reduce their efficiency over time.
When selecting a shaver battery, always consider your shaving needs and the type of shaver you are using. For example, if your razor uses a 3V system, then an alkaline battery will not be powerful enough to operate it correctly. To get an accurate understanding of power requirements and life expectancy, always read the product manual before purchasing any battery.
