All about mobile phone and laptop batteries

The current battery types for mobile entertainment devices, household appliances and tools are nickel metal hydride batteries (NiMH) in battery form as well as lithium-ion batteries (LiIon) as a fixed energy dispenser in mobile devices

Lithium-ion batteries are currently unbeatable


All batteries have the same basic principle: An "Accumulator" (Latin for collectors) accumulates electrical energy during charging via two electrodes (plus and minus), transforms them into chemical energy using a liquid or gel-like electrolyte and stores them in a so-called galvanic Cell. An attached load can now retrieve the stored energy via the two plus / minus electrodes, the battery then converts the chemical back into electrical energy.


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The lithium-ion batteries (LiIon) have now become widely used in portable electronic devices with a built-in power supply or a power supply that is unique in their design. A great advantage of lithium-ion batteries is the very low self-discharge of less than five percent a month. The nickel metal hydride batteries, which are often packaged in battery form, lose up to 50% of their charge per month.


Battery Myths and Facts


In addition, LiIon batteries store five times more energy than comparable NiMH batteries in the same room, which means that they are significantly less space and weight in a device - especially in smartphones, tablets and notebooks, the resulting mobility is a killer argument for many buyers. A NiMH battery per cell is only able to provide a nominal voltage of 1.2 V, while the LiIon-based energy dispenser is about 3.6 to 3.7 volts. By connecting the cells in series, the voltage values ​​can be added. And last but not least, LiIon batteries are comparatively environmentally friendly despite the high energy density.


There are a number of myths around the battery. Some were once true and are now obsolete, others are simply wrong and even dangerous.


1. Regenerate the battery on the heater?


Weak batteries and rechargeable batteries can be spiced up again on the hot heater? For God's sake, do not imitate. Apart from the lack of success on a longer acculeben, the interception is even dangerous. In mobile energy dispensers, liquid electrolytes are present, which can escape from the battery jacket when overheated. Those substances are, on the one hand, corrosive and, on the other hand, highly flammable.


2. Cool for a longer life?


Batteries stored in the refrigerator live longer? The colder, the better for the battery? This claim is definitely wrong! It is true that batteries do not really appreciate extreme heat and actually age faster at operating temperatures of around 45 degrees, but they do not feel more comfortable in the refrigerator - as are the batteries and the people.

In a normal refrigerator, the condensation water might form dangerous for the battery. In the ice compartment, the internal batteries lose their ability to discharge the current through the minus temperatures. Most likely a battery feels about three-quarters charged in a dry environment at an ambient temperature of about 15 to 18 degrees Celsius.


3. Danger of exploding batteries?


Batteries can explode and the device da2525rum around immediately blown? Theoretically, perhaps, but not in practice. News in the press about any events usually only have the meaning to bring big names like Apple and Samsung into the headlines. Although a battery can actually overheat and theoretically catch fire.


In practice, however, these batteries are at least protected by well-known manufacturers via temperature control. The only potential danger is therefore batteries from unknown and nebulous origin, in which unknown manufacturers simply saved any safety measures. There is also no risk of explosion per se for the battery and battery types alkaline-manganese oxide (alkaline), nickel-cadmium (NiCd) and nickel-metal hydride (NiMH)

4. Batteries are useless for some devices?


Exceptionally, this is a myth that is still true today. This is true for all devices which have very little and relatively seldom squeal at the power source, such as remote controls, watches, displays on little used sports equipment, flashlights and the like. The reason: the NiMH batteries in battery form, which are intended for such devices, discharge themselves more quickly than these devices could ever absorb energy.


A normal NiMH battery loses about 50 percent of its energy charge in one month, and loses up to 10 percent on the first day. The only exception are so-called LSD NiMH batteries (LSD = Low Self Discharge), optimized for low self-discharge. Disadvantage of the LSD NiMH batteries is a slightly lower energy capacity than with normal NiMH batteries.