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How to buy batteries for mobile phones!  RSS 2.0

How to buy batteries for mobile phones!

How to buy batteries for mobile phones! The first, on what is necessary to stop - is the weight, size and price. NiCd - the biggest and most difficult, it is approximately two times thicker and heavier than Li-ion. NiMH-battery significantly lighter and smaller than NiCd, but more and more significant than the Li-ion. A similar pattern and for the price: how much cheaper NiCd-battery, so as expensive Li-ion.

The second point. When selling batteries are not usually advertised their service life. If NiCd with proper maintenance can last three years or more (even at a daily charge), the intensive use with NiMH enough only for about a year, and Li-ion for about one and a half - two. NiMH-battery was exhausted by the number of charge / discharge cycles, and Li-ion just grow old, even if it possible for the number of cycles will not be exhausted, and he would just lie on the shelf. For long-term operation NiCd-batteries need to pay increased attention to their service. It is recommended to discharge them completely before the next charge, and periodically, about once a month, to carry out reconstruction cycles. These requirements, although to a lesser extent, apply to NiMH-battery (regenerative cycles are required every two less). In this regard, Li-ion-battery - the undisputed leader: they do not require any special maintenance. They can be charged at any time, day or night, without waiting for a full discharge.
Third. Try to buy the batteries from the same manufacturer as your phone. Branded batteries usually have and brand quality. If you offer a battery from another manufacturer, consult those who have already dealt with them. Be sure to get permission from the seller to take the battery back if it does not suit you, for at least 2 weeks. Immediately after purchase several times check up time of your phone with a new battery and compare it with the specified in the instruction manual. Compare this to the work at the same time the battery (note the difference in capacity). Optimal estimation of parameters of the battery option - before or after the purchase to test purchased battery analyzer.
Types of batteries, advantages and disadvantages:
Nickel-metal hydride (NiMH) batteries NiMH-battery replaced veteran NiCd. It is distinguished by: a large (about 30%) than NiCd-battery capacity at the same size; smaller than the NiCd, the tendency to "memory effect" - the recovery cycles to be performed less frequently; lower toxicity. However, a number of parameters NiMH-batteries still lose NiCd. They have less charge / discharge cycles (about 500), higher self-discharge (1.5-2 times higher) and higher price. Lithium-ion (Li-ion) batteries Li-ion-batteries have gained a strong position in the market of mobile communication devices, due to: approximately twice the capacity than NiCd of the same size; low self-discharge (less than 1% per day); the absence of any maintenance requirements, with the exception of the need to store in a charged state. However, Li-ion-battery some manufacturers can work only with positive temperatures; they are subject to aging, even if not used, plus the high price. Deterioration in capacity observed after about a year of operation. Two years later, the battery is almost out of order. Therefore, Li-ion-batteries should not be stored for a long time. Lithium Polymer (Li-rol) battery Li-rol-batteries recently appeared on the market of cell phones and laptops. At approximately the same density as that of the Li-ion-batteries, Li-pol may have different geometric shape - for example, they can be very thin to occupy any free space. General rules for the use of batteries
1. To increase the life of the new NiCd- and NiMH-batteries are usually in a discharged state, so before use, you must perform a full battery charge. Maximum battery capacity reaches 3 - 4 cycles of charge / discharge. This rule holds true for Li-ion-battery, but they are supplied in a charged state.
2. To increase the life and capacity NiCd- and NiMH-batteries to be fully discharged (phone or charger) before the next charge. We recommend charging the battery once left his cell phone on himself shut down due to low battery. Recommended to charge the phone off.
3. If for any reason you are not able to fully discharge NiCd- or NiMH-battery before charging, do it later. And at least twice a week cycles perform full discharge / charge.
4. It is very convenient to have spare battery. This allows you to constantly bring NiCd- or NiMH-battery, located in the phone, the battery life and thus increase the service life. In addition, you insure against accidental breakages and will be relieved of the need to charge the battery if it suddenly has finished in the middle of the day.
5. Do not leave the battery in cold or warm places, such as in a car in summer and winter, or near a radiator. Phone supercooled battery may temporarily not work, even if it is fully charged. Try to keep the battery at a temperature of 15 ° C to 25 ° C (temperature limits for NiCd- or NiMH-batteries - from -20 ° C to + 45 ° C and 0 ° C to 45 ° C - for Li-ion).
6. Do not charge the battery warm or cold. Wait until it reaches room temperature. The optimum temperature for the charge 15 - 25 ° C.
7. Time with a fresh battery depends on its actual capacity, the intensity of phone conversations, the distance that separates you from the base station, the mode of operation and the ambient temperature.
8. Use the chargers that came with your phone or purchased from your service provider for your specific battery type.

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