Energy Storage Energy storage can be done with capacitors, Super Capacitors, and Batteries. Capacitors are utilized where energy spikes are needed while batteries are used when a more constant energy source is needed.

Batteries Sealed Lead Acid Batteries have been used for decades. They are maintenance free (no water topping-up required). Can be used in any orientation (except upside-down). Have a low self-discharge rate, lower than 3% capacity loss per month.
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Lithium Batteries Lithium Rechargeable Coin Batteries can offer smaller capacities. They are Lead-Free reflow tolerant and operate from -20°C to +60°C.
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Nickel Cadmium Batteries Nickel Cadmium have been reliably used for decades. Ni-Cad's can be recharged over 500 times. Available with and without solder tabs.
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Nickel Metal Hydride Batteries The NiMH battery uses a hydrogen-absorbing alloy for the negative electrode instead of cadmium. NiMH's have a 500 ~ 1,000 cycle durability. Available with and without solder tabs.
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Thin Film Batteries The solid state, thin film, rechargeable energy storage devices are the latest technology available. They are Lead-Free reflow tolerant. Thin Film Batteries have over 5,000 cycle durability.
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UltraCap Capacitors Capacitors are readily used in energy harvesting applications due to their quick charge times and energy smoothing properties. Two properties that are especially helpful in energy harvesting applications without a constant power source.
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Energy Harvesting Suppliers - Energy Storage
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