The lithium-ion battery constant current constant voltage charging characteristic is determined by its depth without charging time 12 hours

1. Activation of laptop battery
Laptop batteries need activation, but this is not the users do. Some laptop batteries battery in the activation process requires open, activating the seal later, the process may only batteries manufacturer to complete. Battery factory factory the hands of the battery to the user, the time and sometimes make battery electrode materials passivation, so the initial Hp pavilion dv6 battery use of the battery manufacturers recommend the best for 3 to 5 times fully charge and discharge process in order to eliminate electrode materials passivation, to reach maximum capacity.
The second activation is possible, the user first notebook to use the new battery several times as deep charge and discharge cycle. But does not require full 12 hours. Early NiMH batteries as necessary to supplement and trickle charging process, to achieve perfect the fully charged state, you may need about 5 hours, but also do not need 12 hours. The lithium-ion battery constant current constant voltage charging characteristic is determined by its depth without charging time 12 hours.
Stored for a long time to do a notebook battery could help activate the battery charger into the state. Is: first, directly off the battery until the nature, and then charged to show full, plus 1-3 hours of red. The advantage: both the preliminary warm-up the battery, to avoid the past "three times 14 hours of initial charging," the trouble (the Act at the expense of consumption of the actual battery life in exchange for activating a speed), then the battery is in use "natural activation . "battery protection board and intelligent battery Lithium ion state in existence, is quite safe. However, batteries in over charge, over discharge caused by high temperature, internal pressure increases there is still damage even under the danger of explosion.
2. Memory effect
Laptop battery laptop battery memory effect is reversible failure, battery failure is back again after the performance. Memory effect refers to the specific work cells undergo a long cycle, automatically keep this particular trend. The first definition of the nickel-cadmium battery, nickel cadmium battery bag memory effect does not exist, sintered battery has memory effect. And now the nickel metal hydride (NiMH known) batteries and lithium ion batteries are not bound by the definition of the memory effect. because modern nickel-cadmium battery Gong Yi's improvement, the memory effect has been reduced significantly, while the other phenomenon Tihuan This definition, Jiu Shi Ni-based batteries lattice of, typically, nickel-cadmium batteries by the combined effects of these two effects, the Ni MH battery only by the lattice-based memory effect and influence than the smaller nickel cadmium batteries.
In practice, the elimination of memory effect means there are strict norms and an operation process. Improper operation would be counter-productive.
For nickel-cadmium batteries, regular maintenance is a periodic deep discharge: use per month (or 30 cycles) to a depth of discharge (discharge to 1.0V / per session, foreigners call it exercise), normal use is to run out of battery or use other means to ease off the formation of memory effect, but this is not exercise, because the equipment (such as mobile phones) are not used 1.0V / per session before the shutdown, and must be special equipment or line to complete the work Fortunately, many Ni-MH battery charger comes with this feature.
No exercise Hp nc6400 battery for long-term nickel cadmium batteries, because of the cumulative memory effect, can not exercise for capacity back, then you need a deeper discharge (called a foreigner recondition), which is a long time with a small current to the battery discharge to 0.4V each section of a process that requires specialized equipment.
For NiMH batteries, exercise for the frequency of about once every three months can be an effective mitigation memory effect. Because Ni-MH battery cycle life is far less than the nickel-cadmium batteries, with almost no recondition this method.
Therefore, lithium-ion batteries, discharge the battery before each charge is unnecessary, but harmful, because the battery life cut short unnecessary. Using resistance or light bulb then proceed to discharge is not desirable, the current can not control, not careful, too easily put 0V, even lead to the battery series battery polarity reversal.
3. Battery life cycle
One theory is that rechargeable batteries used properly, will appear in a certain range of a cycle the best state, is the largest capacity. This situation should be divided, sealed nickel metal hydride batteries and nickel-cadmium batteries, if used properly (such as regular maintenance to prevent the production and accumulated memory effect), usually 100 to 200 cycles in the Department reached its maximum capacity, such as factory capacity 1000mAh Ni-MH battery after 120 cycles, its capacity may reach 1100mAh. Almost all Japanese Ni-MH battery manufacturer's technical specifications book describes the cycle characteristics of nickel-based batteries the map we can see this description. Nickel-based batteries have the best state, is generally between 100 to 200 cycles reached its maximum capacity
For liquid lithium-ion batteries, but there is no such a cycle hump phenomenon capacity, lithium-ion battery from the battery factory to the final retirement date, the performance of its capacity is to use a little time. In the cycling performance of lithium-ion batteries do when there has never seen signs of recovery capacity. Lithium-ion battery is not the best condition.
It is worth mentioning that the lithium-ion batteries are more vulnerable to changes in ambient temperature performance of different properties, in 25 to 40 degrees ambient temperature will show its best performance, but low or high temperature conditions, his performance is significantly impaired the .
There is another measure on the cycle life is the time. Some experts say the general civilian lithium-ion battery life is 2 to 3 years, combined with the actual situation, such as 60% of the capacity of the termination of life, coupled with lithium the role of ion battery aging, with the time to express my opinion, more reasonable cycle life.
Mechanisms of lead-acid battery charging similar to lithium-ion battery is limited to limited pressure mode, the way that light is sufficient light up, his life is the time of presentation, not the number, such as 10 years.
Therefore, the lithium-ion batteries already suitable manner at any time use charge, and this is his NiMH battery for one of the greatest advantages, please take advantage of this feature.
4. Notebook battery store
Lithium ion batteries have a very good feature, is the limitation of lithium-ion battery (or called aging, foreigners Chen Wei aging), is the lithium-ion battery in storage for some time, even if not to recycle some of its capacity and potentially permanently loss, because the lithium-ion battery anode and cathode material from a factory has already begun its failure process. different temperatures and battery fully charged state, the aging effects of different, the following data taken from reference [1], to capacity percentage of the forms listed:
Storage temperature - 40% ------- 100% state of charge state of charge
0 degrees ------- 98% (94% a year later )----- (one year later)
------ Of 25 degrees (96% a year later )----- (80% a year later)
40 degrees ------ 85% (a year later )----- 65% (one year later)
60 degrees ------ 75% (60% a year later )----- (3 months later)
Thus, the higher the storage temperature and battery charge, the more saturated, the more severe the loss of their capacity. So I do not recommend long-term preservation of lithium-ion battery, the other hand, manufacturers should treat the same rotten food to recycling. Users should pay close attention battery production date.
Idle if the user has the hands of the battery, so experts recommended storage conditions for the charge level is 40%, storage temperature below 15 degrees or less.
The nickel-hydrogen batteries and nickel-cadmium battery is almost no role in the aging, long-term storage of nickel-based batteries charge during deep discharge after a few deep can restore its original capacity.
Battery should be charged on a half (50% semi-charging) state. Residual pressure is too low, due to self-discharge after long-term storage to the battery voltage falls below 2.75V will affect battery life, dropping to 2.2V below "dead zone" or even a deep slumber and scrapped. The fully charged, the battery material is active, the rapid aging and self-discharge, it will also affect the life span.
Characteristics of lithium-ion battery, light weight, capacity ratio, self-discharge slightly (by 1% / day), charging efficiency (charge input capacity is almost equal to the battery output capacity), no memory effect, no maintenance, discharge, single voltage up to 3.7V (3.6V), cycle number up to 300-1K, with rapid charging capability, excellent high-temperature discharge characteristics.
5. Private practice
In the past, in order to activate the long-term storage or memory effect of batteries have a useful impact on the method of high current, transient current or up to 10A. Now this approach has not desirable. Now the battery has a chip to protect over charge and over discharge, high current charge either by limiting charge does not go up or breakdown protection circuit, the depth of discharge is also very dangerous, almost instantaneous short circuit current will make the battery voltage is 0 or even result in polarity reversal. like a motorola cell phone battery will be considered "non- recognition "and denied charge.
When using the battery in the laptop, turn off power management in battery alarm, the battery fully exhausted, and then deep charge. This repeated several times to achieve the purpose of activation.
There is a frozen practice: paper and plastic wrap to prevent moisture, and then into the fridge freezer, 3 days out, place two days for the battery of natural recovery. From the nature of the battery can look at this method to try to restore Some electricity is 50% probability.

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Stored for a long time to do a notebook battery could help activate the battery charger into the state. Is: first, directly off the battery until the nature, and then charged to show full, plus 1-3 hours of red. The advantage: both the preliminary warm-up the battery, to avoid the past "three times 14 hours of initial charging," the trouble (the Act at the expense of consumption of the actual battery life in exchange for activating a speed), then the battery is in use "natural activation . "battery protection board and intelligent battery Lithium ion state in existence, is quite safe. However, batteries in over charge, over discharge caused by high temperature, internal pressure increases there is still damage even under the danger of explosion.

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