NiMH batteries are popular with digital camera users.
The length of time an NiMH battery will hold its charge depends on several factors. But there are a few guidelines that can help you determine how long you can expect your batteries to last.
Function
Nickel Metal Hydride (NiMH) batteries are used to power devices ranging from electric cars to cellular phones and digital cameras. They are popular batteries because they function sealed -- within a casing, which minimized leaks -- and can endure through high-power loads.
Rate of Discharge
According to CalRecycle, a typical NiMH battery will lose approximately 4 percent of its charge per day if left at rest -- up to an average maximum of about 30 percent per month. Discharge rates are higher in warm temperatures. Discharging occurs at a much faster rate if the batteries are being used.
Time Frame
Most consumer NiMH batteries are measured in mili-amp hours (mAh). Not all NiMH batteries are rated for the same mAh. An average AAA NiMH battery can last for about 1000 mAh. But an average AA NiMH battery can last up to 2700 mAh. One of the benefits of NiMH batteries is that they maintain their strength over their lifespan, meaning that a NiMH battery will discharge and perform similarly when new and when it's approaching the end of its lifespan.
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