MP3 charging you give it? Detailed performance lithium batteries
MP3 on the market today screen bigger and bigger, more powerful, but there is a multi-year data has not changed, and even backwards. That is the battery capacity. Thinner body in pursuit of better portability, battery to make a sacrifice. Now with MP3 players can watch movies about 3 to 4 hours, music for 12 hours. Marked as Q2 50 hours battery life is very strict conditions to be reached under. For example, the bit rate songs, the perfect battery charging, sound off, the volume limit and so on. So in order to use more time for everyone to talk about how to "serve" the battery.
Li-ion battery in the discussion, we must first understand two types of lithium batteries: lithium and lithium-ion batteries. Lithium is the electronic form of button batteries and other products, in theory, can also be charged. But not only ineffective, but also easy to short circuit, so the charge is generally prohibited. Later, after Sony's improved design materials, the invention of lithium-ion batteries. This is what we are now widely used in lithium batteries, more secure, longer life expectancy. The following discussion of the lithium batteries, lithium-ion batteries are.
1. How to charge.
Legend I: battery memory, the first three charging must be filled, at least 12 hours! This statement refers to the nickel batteries. Nickel battery memory is strong, the beginning of active use does not affect the full. Although lithium batteries have activated, but it is easy, after 3 to 5 times the normal charge-discharge can be activated. No memory of its own.
Classic gum battery SONY
SONY classic gum battery, you can see it clearly marked as Ni-MH (nickel-metal hydride) batteries.
Note that instead of charging for too long will cause harm lithium batteries, so the vast majority of electronic products are charging protection function. When the battery is full, the automatic power off. We can not guarantee protection must rely on charging to live, just in case, we still do not charge the battery for a long time As for the state. In addition, some local voltage instability, the volatility of lithium resistance relatively poor, a longer charge time, which means even more vulnerable.
2. When charging.
Legends II: Try to run out of power, preferably automatically shut down to recharge. It is also said nickel battery. As the memory of nickel batteries, so each time with a photoelectric before charging starts. Some people may remember, the early cell phone charger as well as "discharge" of this feature. However, this rule does not apply lithium battery completely, but over-discharge of lithium harmful. In order to ensure the life of lithium batteries, the best low power consumption at the prompt to start charging.
Ni-Cd (nickel-cadmium) batteries
The first generation of rechargeable batteries, Ni-Cd (nickel-cadmium) batteries. Have memory and cadmium harmful to human health.
That a true story. I once went out to play, the phone is not timely charge, leading to completely run out of power. Can not be recharged back to power, and had to give customer service overhaul. This is because the battery voltage is too low, excessive electrical discharges cause, or even do not have the normal charging conditions.
3. Use considerations.
Been heard in recent years, mobile phone battery explosion thing. Light were burned property, severe burns or even users. The explosion culprit Well, that is, the battery (nonsense, no board can hear an explosion!). This is because the lithium battery in contact with water, many materials can be dramatic chemical reaction and release large amounts of heat, resulting in fever, burning. Lithium manganese dioxide cathode, only a small drop of water can dip fever phenomenon. Lithium thionyl chloride in contact with water, hydrochloric acid and sulfur dioxide at the same time generate the release of heat. Understand the truth and prevent the method is simple, just pay attention to waterproof it. Without the lithium battery products, must take the battery out a separate place. Winter is coming soon, after coming back from the outside must be careful not to MP3, mobile phones and other products remain on clothes pocket. Condensation products both inside and outside will become very wet, dry and ventilated in time. Even if the battery is no problem, they may cause a short circuit, damage to equipment.
Pants were burned battery
Some users may want to ask, you can while charging watching movies? This problem can not be generalized. Some products of the AC circuit and battery circuits are designed separately, while no problems using the boundary charge. However, some will not be able, if not stated in the instructions, for safety reasons, it is best to contact customer service.
Lithium battery tips
Li-ion battery is a lithium metal or lithium alloy anode material, the use of non-aqueous electrolyte solution batteries. Reflect the process:
Li + MnO2 = LiMnO2 the redox reaction of the discharge.
While lithium batteries can be widely used only in recent years, but it has a long history. The first piece of lithium battery is invented by the great inventor Thomas Edison. Because lithium metal is very lively, very high on the manufacturing process made the request. Early use only in the aerospace or military field, with the upgrading of manufacturing technology, the device was able to promote civil.
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