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    NiMh


    NiMH (Nickel Metal Hydride) Rechargeable Batteries (AA, AAA, C, SC, D, F, 9v and More)

    Nickel Metal Hydride cells( NiMh) are rechargeable batteries commonly used in consumer electronics. NiMh cells hold 2 to 3 times the capacity of NiCd batteries, and are the popular choice for high-drain devices such as: digital cameras, mp3players, GPS units, cordless power tools, and even many electric/hybrid vehicles.

    Unlike NiCd chemistry, NiMh batteries do NOT experience “memory effect”, a term which means reduced capacity in a battery caused by re-charging before the battery has been fully discharged. The battery then “remembers” it’s new, lower capacity. In today’s hectic lifestyle, it’s a great convenience to have a “no memory effect” battery because the consumer is free to recharge their NiMh batteries, without concern for the level of charge left in these batteries at the time of recharge.

    NiMh rechargeable batteries are available in different sizes: AA, AAA, C, SC, D, F and 9 Volts.

    NiMh AAA Batteries

    Capacity between 300mAh and 1000mAh. A newer version of the AAA, has a low discharge capability, which means it can hold it’s charge for up to 2 years. This is often an attractive choice for schools as an example, whose devices and batteries remain unused/idle during summer months when they are closed.

    NiMh AA Batteries

    Capacity between 500mAh and 2500mAh. They are available in a low discharge format, holding their capacity for up to 2 years.

    NiMh C Batteries

    Capacity between 3500mAh and 4000 mAh. As with AA and AAA sizes, the low discharge version of the C size is also widely used in schools and other institutions/applications where a slow discharge might be economically required.

    NiMh SC Batteries

    This is the Ideal NiMh rechargeable battery for use in cordless power tools like drills and rebuilding RC (radio-controlled) battery packs.

    NiMh D Batteries

    Capacity between 8000 mAh and 10000mAh, and once again, come in a low discharge version where slow discharge is preferred.

    NiMh 9V Batteries

    9 volt NiMh rechargeable batteries technically deliver 8.4 volts of energy.Common capacities of 9 volt NiMh batteries are: 175 mAh, 250 mAh, 300 mAh and325 mAh. As with the other size NiMh batteries listed in this article, a lower discharge version is available for the 9 volt as well.

    NiMh Low-Discharge Batteries

    Since they are designed to hold their charge for up to 2 years, they are becoming increasingly popular among consumers, and it’s logical to predict that they will soon outsell regular discharge NiMh batteries and as this shift occurs, their currently higher price, will drop accordingly. Standard NiMh batteries will self discharge after 30 - 40 days. The low discharge Nimh batteries are being advertised as keeping their charge (up to 85% of their charge) for approximately 2 years.

    NiMh Battery Packs

    NiMh battery PACKS are made up of individual cells of 1.2 volts each, to create4.8 volt packs, 6 volt packs, 7.2 volt packs, and so on. When charging your NiMh battery packs, it’s always a good idea to use a Smart Charger rather than a Timer Controlled Charger, to ensure a full and long lasting charge.

    NiMh Batteries with Tabs

    These batteries have spot welded tabs, used for building any size Battery Pack  (2.4 volt, 3.6 volt, 4.8 volt, 6 volt, 7.2 volt, 8.4 volt 9.6 volt, 10.8 volt, 12 volt ..etc) ranging in ratings of 120mAh - 10,000 mAh.

    NiMh Flat Top Batteries

    These batteries are also great for use in building any size battery pack (2.4 volt, 3.6 volt, 4.8 volt, 6 volt, 7.2 volt , 8.4 volt, 9.6 volt, 10.8 volt, 12 volt ..etc) for those who are able to put on the tabs themselves. These are a little cheaper than batteries with tabs and all that is required to attach the tabs, is the ability to operate a simple spot welder.

    NiMh Battery Chargers

    Battery Chargers that charge NiMh chemistry batteries are sold in two different types.One is called a Timer-Controlled Charger and the other is called a Smart Charger, or Intelligent Charger. The differences in price will be noticeable but so isthe difference between what each type delivers.

     

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