2012年1月11日星期三

Information to Rechargeable AA batteries

Rechargeable AA batteries almost always make economic sense. There are various types of rechargeable AA batteries and their capacity varies with the technology used. Rechargeable AA-sized batteries based on Li-ion chemistry have also been introduced. Unfortunately, these batteries are rated at a higher 3.6 volts and are incompatible with most AA-based devices. Rechargeable AA lithium have a relatively low internal resistance that effectively provides unlimited maximum current that will flow when they encounter a low or zero resistance load. The simple AA lithium batteries will allow very high current flow and such equipment will not tolerate the higher current. This incompatibility with AA lithium is somewhat common in less expensive equipment with either motors or electronic flashes as it will draw too much current from rechargeable AA lithium, recycling very quickly once, if that much, before burning out a circuit component. For the devices that perform better with the 1.5 volts of an alkaline and are not high drain as high drain devices deplete alkaline batteries very quickly then the rechargeable alkaline AA and AAA batteries will work well in them . Rechargeable AA batteries suffer from self-discharge, whereby a full battery loses its charge when stored for a significant period of time. The low self-discharge is distinguished by a much lower rate of discharge, claimed to be around 8% after 60 days. These batteries can be sold pre-charged and ready for use. The upfront cost of setting with rechargeable AA batteries and the charger may seem off-putting at first, especially when there is need to have some extra batteries that can be recharging while you're running devices like the Walkman, wireless computer mouse, and battery-powered toys. Rechargeable AA batteries make the most sense for devices that get heavy to moderate use and have a high watch repair to Iphone 4s Battery medium current draw. These are the devices which require changing of batteries for at least once a month, or every couple of months at a minimum.There are some uses where rechargeable AA batteries simply do not make economic sense, to say, low-draw devices like battery-powered wall clocks, smoke detectors, and remote controls and devices that have long idle times like emergency flashlights.

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