Batteries are necessary to power important devices like flashlights and smoke detectors. They enable us to communicate and enjoy music on the go. However, they also create hazardous waste and harm the environment in various ways. The most eco-friendly batteries last for several years and contain the fewest toxic substances.
Rechargeable

Three major types of rechargeable batteries include nickel-metal hydride, nickel-cadmium and nickel-zinc. They all help to reduce the amount of battery waste that enters our environment. NiMh batteries last longer than Ni-Cad units, and they don't contain toxic cadmium. They remain easier to find in stores than Ni-Cad or NiZn products.

The new NiZn rechargeable batteries deliver a higher voltage and hold more power than the other types. They don't suffer from the "memory effect" to any considerable degree, so you can charge an NiZn battery at any time. However, they require a special type of charger that cannot safely charge other batteries. They also cost more.

Lithium

Disposable lithium batteries offer a convenient alternative to rechargeable. They last approximately five to nine times longer than alkaline units. These eco-friendly batteries also take longer to expire. They can sit in a closet for up to 10 years and remain useful. This is the best type of battery to keep for emergencies.

Lithium batteries supply a higher voltage than Ni-Cad or NiMh rechargeable. This improves the performance of some devices, such as flashlights, cameras and smoke detectors. Lithium batteries contain relatively few toxic materials. However, they are not normally available in "C" or "D" sizes.

Lead-Acid

Many motor vehicles use large lead-acid batteries. This type of battery is easy to recycle. State laws require most battery retailers to accept old lead-acid units and recycle them, according to the Environmental Protection Agency. You may charge this type of battery with power from a wall outlet or a small solar panel.

If you don't have enough money for eco-friendly batteries, choose the longest lasting type you can afford. Alkaline batteries last significantly longer than carbon-zinc units. Please remember that it's very important to recycle all lead-acid and rechargeable batteries. Otherwise, they can cause serious air, water and soil pollution.