Although “high-energy”, “ultra-high energy” and “endurance” and other words are always marked on jacketsof batterieson the market, it does not accurately represent the battery life time, since the performance of a battery is closely related to its inherent characteristics.

Price for super an alkaline battery is definitely higher than that of a super heavy duty battery, but its life time can be 5 or even 10years if usedin the big current applications. So it will be more economical.

A rechargeable battery is more expensive than a super alkaline battery and extra cost will be needed for charging.However arechargeable battery can be used up to 1000times, so it will be more economical in the long run.

A NiCD battery has almost the same characteristics as a NiMH battery, but a NiMH battery will last longer than a NiCDbattery after charging, for the same battery size.