![]() ![]() Rechargeable batteries are better for frequently used consumer electronics and maintain their power level as they discharge, which alkaline batteries do not. Low-drain applications include wall clocks and remote control devices. For example, a flashlight kept for emergencies should have a single-use battery so that it will function when needed. They are ideal for applications that are low-demand or low-drain in nature. Single-use alkaline batteries still have a place, largely because of their long shelf life. They are more expensive to purchase however, they have a far better cost-performance ratio because they can be re-energized hundreds of times at a cost of a few cents per charge. NiMH batteries don't share this disadvantage.Ī major plus for rechargeable batteries is cost. One reason that older NiCd rechargeable batteries have lost favor is that they must be drained completely or they will not fully recharge. NiMH batteries must be recharged every month or two even when not in use, while single-use alkaline batteries that are not in use will hold a charge for five to seven years. ![]() The main disadvantage of NiMH batteries, though, is a short shelf life. Between this and their reusability, using rechargeables means far fewer of these chemical devices find their way to landfills where they may contaminate the environment. Rechargeable batteries are also recyclable. ![]() You must dispose of non-rechargeable batteries and purchase more when they are depleted. NiMH batteries can be recharged 150 to 500 times. The fact that rechargeable batteries can be re-energized and reused is a major advantage. By contrast, passing an electric current passed through a NiCd or NiMH battery will reverse the chemical changes and re-energize the battery. Non-renewable alkaline batteries usually rely on a chemical reaction between zinc, magnesium oxide and potassium hydroxide. The main rechargeable technology now sold is nickel-metal hydride, or NiMH. Prior to 2000, nickel-cadmium or NiCd batteries were the primary rechargeable type. Whether or not to use rechargeable batteries is mainly an issue for small devices powered by AAA, AA, C and D batteries. The most obvious example is the car battery, which is in a constant state of recharging. For some applications, functional requirements make rechargeable batteries the only practical choice. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |