Batteries come in a variety of styles.
Rechargeable batteries are one of the main components of modern electronics. Designed to last longer and allow for longer usage times between replacements, they beat out disposable batteries in value. Not all rechargeable batteries work in the same way. You may choose a battery according to price, but some devices require specific batteries. Rechargeable lithium batteries are superior to standard types.
History
Disposable batteries have always been the main type of battery used in small appliances such as flashlights, toys, remote controls or smoke detectors. For some of these uses, such as toys or flashlights where replacing batteries was a constant task, the invention of rechargeable batteries was a money- and environment-saving step forward. Newer and more improved types of rechargeable batteries have broader uses and can last even longer. The type of battery you choose is usually determined by the equipment it powers.
Nickel Cadmium and Nickel Metal Hydride
These standard rechargeable batteries offer a definite advantage over disposable batteries. They are available in a variety of sizes and voltages, and are generally sold as a starter pack with a charging device or as stand-alone packs. These are excellent choices for things such as TV remotes, small electronic toys and things you use frequently. The drawback is that they need to be completely emptied before recharging as they have what is called memory effect--if the battery maintains some amount of power before it is recharged, it gradually will begin to only recharge to a certain point and not its original full power. You can recharge NiCad and NiMH batteries 200 to 300 times depending on the care and usage, but you will always notice a diminished capacity as the battery ages.
Lithium Technology
Lithium ion, lithium polymer and standard lithium batteries last longer and hold power better than most other forms of batteries. Standard lithium batteries are not rechargeable, however, the lithium ion and polymer types are. All of them are lighter in weight, more powerful, can be recharged many more times than standard rechargeables and do not have a memory effect problem. Devices such as digital cameras can take the standard or regular rechargeable lithium battery.
Which To Choose
Determine the best battery for your use by consulting the product manual to see if it requires a particular type. If any type of battery is acceptable, decide how often you will use the device and the power it takes. A general rule of thumb is that for things that take heavy use such as toys, the best rechargeable battery that you can afford will save you in the long run. If the item is something that is used often but not a constant power drain, a standard non-rechargeable lithium battery may save money, as you do not need to purchase a charging system and the standard lithium will last for an extended period of time before needing replacement.
Things to Remember
Any type of battery needs proper disposal, especially rechargeable batteries. Some types are more prone to high heat, especially the lithium types, and this is a consideration when deciding which type to use. Children should never handle chargers and batteries.
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