That depends based on what you want out of your battery. Nickel-cadmium betteries are good where long life, high discharge rate and extended temperature range are important; while Nickel-metal-hydride is better where higher energy density is needed at the expense of reduced cycle life. Lead-acid is good where economy and large power needs are important, whereas lithium-ion batteries are good for high-energy density and low-weight needs.
There even rechargeable batteries on the market today. While these need energy to recharge, they lower the impact on the environment from toxic disposable batteries.
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