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The Best Reasons to Choose Factory-direct Laptop Battery from NearbyExpress
As a professional dropship supplier of electronics, NearbyExpress provides all his customers with quality products such as laptop battery at factory-direct price. All the cell types of laptop battery there are Li-ion, which is the critical reason for customers to choose NearbyExpress as their NO.1 suppliers. In order to dig out the culprits behind factory-direct laptop battery (http://www.nearbyexpress.com/catalog-products-1/laptop-accessories/laptop-battery.html ), I would like to display you the clear comparison between advantages and disadvantages of Li-ion laptop battery.
Note that both advantages and disadvantages depend on the materials and design that make up the battery. All following summary reflects older designs that use carbon anode, metal oxide cathodes, and lithium salt in an organic solvent for the electrolyte.
Advantages first, let's take a lithium-ion battery from a laptop computer for instance.
1, Wide variety of shapes and sizes efficiently fitting the devices they power with much lighter than other energy-equivalent secondary batteries.
2, High open circuit voltage in comparison to aqueous batteries (such as lead acid, nickel-metal hydride and nickel-cadmium). This is beneficial because it increases the amount of power that can be transferred at a lower current.
3, No memory effect. Self-discharge rate of approximately 5-10% per month, compared to over 30% per month in common nickel metal hydride batteries, approximately 1.25% per month for Low Self-Discharge NiMH batteries and 10% per month in nickel-cadmium batteries. According to one manufacturer, lithium-ion cells (and, accordingly, "dumb" lithium-ion batteries) do not have any self-discharge in the usual meaning of this word. What looks like a self-discharge in these batteries is a permanent loss of capacity (see Disadvantages). On the other hand, "smart" lithium-ion batteries do self-discharge, due to the drain of the built-in voltage monitoring circuit. In addition to, components are environmentally safe as there is no free lithium metal.
Then let's move to the disadvantages of Li-ion laptop battery.
First of all, cell life is the most obvious to get damaged. There are several situations in which cell life of your factory-direct laptop battery shortened to some extent.
On the one hand, charging forms deposits inside the electrolyte that inhibit ion transport. Over time, the cell's capacity diminishes. The increase in internal resistance reduces the cell's ability to deliver current. This problem is more pronounced in high-current applications. The decrease means that older batteries do not charge as much as new ones (charging time required decreases proportionally).
On the other hand, high charge levels and elevated temperatures (whether from charging or ambient air) hasten capacity loss. Charging heat is caused by the carbon anode (typically replaced with lithium titanate which drastically reduces damage from charging, including expansion and other factors).
What's more, a Standard (Cobalt) Li-ion cell that is full most of the time at 25 °C (77 °F) irreversibly loses approximately 20% capacity per year. Poor ventilation may increase temperatures, further shortening battery life. Loss rates vary by temperature: 6% loss at 0 °C (32 °F), 20% at 25 °C (77 °F), and 35% at 40 °C (104 °F). When stored at 40%–60% charge level, the capacity loss is reduced to 2%, 4%, and 15%, respectively. In contrast, the calendar life of LiFePO4 cells is not affected by being kept at a high state of charge.
Secondly, internal resistance is another problem you may come across in use. The internal resistance of standard (Cobalt) lithium-ion batteries is high compared to both other rechargeable chemistries such as nickel-metal hydride and nickel-cadmium, and LiFePO4 and lithium-polymer cells. Internal resistance increases with both cycling and age. Rising internal resistance causes the voltage at the terminals to drop under load, which reduces the maximum current draw. Eventually increasing resistance means that the battery can no longer operate for an adequate period.
To power larger devices, such as electric cars, connecting many small batteries in a parallel circuit is more effective and efficient than connecting a single large battery.
Thirdly, in order to keep your factory-direct laptop battery under a great condition, the following Safety requires.
If overheated or overcharged, Li-ion batteries may suffer thermal runaway and cell rupture. In extreme cases this can lead to combustion. Deep discharge may short-circuit the cell, in which case recharging would be unsafe. To reduce these risks, Lithium-ion battery packs contain fail-safe circuitry that shuts down the battery when its voltage is outside the safe range of 3–4.2 V per cell. When stored for long periods the small current draw of the protection circuitry itself may drain the battery below its shut down voltage; normal chargers are then ineffective. Many types of lithium-ion cell cannot be charged safely below 0°C.
Except from the above requirements, other safety features here are required in each cell:
@shut-down separator (for over temperature)
@tear-away tab (for internal pressure)
@vent (pressure relief)
@thermal interrupts (over current/overcharging)
Though many a disadvantages we may encounter in our daily usage of laptop battery, Li-ion laptop battery is touting by multiple laptop users and dropshippers because of the quality quality and lucrative profits you can reap of those best-seller items in the webshop!
About the Author
I'm the sales manager of NearbyExpress (http://www.nearbyexpress.com/catalog-products-1/laptop-accessories/laptop-battery.html ), which is the professional dropship supplier of factory-direct Wholesale China Electronics, Laptop Accessories and Computer Parts, Oil Paintings and Pet Training Devices for Dropship and Small Business Customers. Under the contorl of first-tier ERP system and around-the-clock customer service representatives waiting for you, you can get what you want in our website anytime and anywhere! Choose NearbyExpress,choose fortune!
what is the process for purchasing an auto direct from the factory?
can you save any money over buying from a dealer. where are factory sites. are there internet sites to aid in such a purchase
The manufacturers sell to the dealers, and the dealers sell to the public. If you could bypass the dealers, the dealers would soon go out of business and there would be no source for any warranty repairs!
If you want to buy from the manufacturer, you will have to buy a dealership!
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