Lithium-Ion Batteries’ Sensitive Heat
Over 15 million students are enrolled in fall college classes across the United States according to a US Census Bureau study in 2004. Using that number as a base it can be projected that the fall of 2008 should see a slight up-tick in college enrollees. Interestingly the number of college students that are going to college with hp laptop battery, hp ev088aa, hp 417066-001, hp f4486b, hp cgr-b1870ae have increased by 28% compared to 42% of college students in 2004. This means that nearly 70% of enrolled students are using laptop computers. In real numbers that represents 10,500,000 laptop computers.
Now listen up college students – your laptop battery is more than likely a Li-ion battery and if it is then there is a natural tendency to keep your laptop bta0302001, hp pavilion zd7000 battery, hp pp2182d, hp pp2182l plugged into a wall outlet when you are close to one. You may also find that you are actually “plugged” in to a wall outlet more than you are not and there in lies a problem. When your laptop is plugged into a wall outlet your battery heats up big time and heat and lithium do not mix well together.
Hold on! You have to charge hp 345027-001, hp 342661-001, hp pavilion dv8000 battery, hp hstnn-db20. Yes that is true, but you do not have to keep your laptop plugged into a wall outlet for the entire school year! But won’t that reduce my battery life if I’m constantly powered from the battery?
Your battery will diminish in capacity – the ability to charge and power your laptop. That is a fact and a natural consequence of battery today. This diminishing power performance is called battery degradation and power loss. I have written on this topic before and you can read about it on my blog but on a high level a hp 395789-001, hp 396008-001, hp pavilion dv9000 battery, hp ev087aa battery over time degrades and eventually stops working, this is no surprise, and it occurs due to the following technical processes: declining capacity, increasing internal resistance, elevated self-discharge, premature voltage cut-off on discharge.
So should you constantly keep your battery charged at 100% capacity? No you should not. Why? To answer that question let’s look at what is occurring when you charge a battery. When charging your battery you are forcing electrical current into a battery cell from a charger. The force of electrical current causes temperature increases.
Now it is true that contained within your laptop battery are integrated power management circuits that are designed to protect against over-voltage and under-voltage conditions that increase heat in the hp ex942aa, hp pavilion zt3000, hp 337607-001, hp 337607-003 but one factor of how well a battery is being protected during a charge depends on the ratio of the heating rate versus the dissipation rate. If the heating rate is higher then the dissipation rate then thermal runaway will occur (leaking, smoking, gas venting, flames).
Now don’t go into panic mode since the integrated circuits are really good at keeping the heating rate lower than the dissipation rate and you are in extremely minimal danger of thermal runaway occurring.? But the practice of keeping your battery charged continuously can negatively affect your battery’s longevity. So charge your battery and then run your laptop on dg103a, 398876-001, pb992a, pb994a, pb991a power until you have to charge it again.
A letter about Dell’s recalling batteries model(a)
Dear Dell users, Dell has been found in some Dell Latitude ?, Inspiron ?, XPS ? and Dell Precision Mobile Workstation ? notebook computer toshiba laptop battery were related to the potential problems that exist. In line with the U.S. Consumer Product Safety Commission and other regulatory agencies with the relevant provisions, Dell voluntarily withdraw some of the battery cell from Sony-made batteries Dell brand, and provide free replacement battery.
In very rare circumstances, these batteries may overheat and cause a fire risk. Likely to be affected by the following satellite a65 series , satellite 2100 battery models of DELL notebook computer or as a second battery sold separately: Latitude: D410, D505, D800, D810 Inspiron: 9400, E1505, E1705 Precision: M20, M60, M70, M90 XPS: XPS, XPS Gen2, XPS M170, XPS M1710 In addition, these batteries may have also as a service to respond to the request and provided. These batteries in April 1, 2004 to July 2006 18 shipments. "DELL", "Made in Japan", "Made in China", "Battery cell made in Japan Assembled in China" in the words printed on the back of the battery. If you do not have the words of the battery is not in the recall list, and you can now withdraw from the site. You can use one of the two (2) step-by-step operation to identify your pb994a, pb991a, thinkpad t40 battery, thinkpad t41 battery is affected:
Check your battery is affected. If your battery is not listed, you will not be affected. Check your specific battery PPID (Dell spare parts logo) would be affected. Through the steps to identify your battery is affected. Only a few models in each of the affected batteries. If the batteries belonging to the scope of the recall, you will be automatically connected to the replacement order form. Step 1: Type your ibm laptop battery, thinkpad t42 battery, thinkpad r50 battery is affected