Laptop Battery: Give Extra Power to the Gadget
battery May 15th, 2010
A personal laptop must have a high quality battery and a charger as one of the integral and most important components of this gadget. It is very crucial consideration while buying a laptop battery is that the batteries essential for a particular brand of laptop vary from batteries used for other brands of laptops. You must go with a laptop battery that has best ever life term for your equipment. Since a wide variety of laptop batteries available in the market with different technologies, a laptop should be considered especially for the kind of battery it uses.
Laptops are the electronic equipments popularly known for their unique power consuming capacity. They chomp through more electricity in compare to other equipments of the category. There are various reasons asserted for the short life of the laptop batteries. Temperature inside the laptop is one of the major factors that decide the battery life. When the temperature in the laptop reaches around 45°C, a battery loses half of its power when working. A laptop user must avoid to leaving a laptop in a car that is parked in the direct sun light because it results in severe battery damage.
While using laptop, you may think about some small however important cautions that can help in increasing the battery life of your laptop.
â¢Â   Reduce the brightness level and screen resolution of your laptop as it lays strain on the display card and therefore devours further power of your battery
â¢Â   When you are not using internet on your laptop try not to switch on Wi-Fi network as it adds more battery consumption
â¢Â   It must be avoided to remove battery manually as it may cause the entire battery discharge and leaves the battery damaged
â¢Â   Putting laptop on hibernate is a good battery saving technique as it saves the battery power comprehensively
â¢Â   Never try and charge your battery when its only half discharged, this will cause the battery not to charge properly.
â¢Â   Having the laptop on your lap most of the time rather on a flat surface may increase the battery temperature and damage the power life of your laptop battery
Old laptop batteries need to be replaced with new ones from time on appropriate times that gives better service and better value for money.
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May 15th, 2010 at 4:17 pm
Help! Please compare the power capacity of these 2 rechargable batteries and tell me which has higher capacity?
2 laptop external batteries:
I am looking at 2 separate rechargable battery units which can be charged and each can be used (as well as for the usual handheld devices + phones) as a spare, external laptop computer battery.
One of the items is a rechargable battery alone. And the other item is a rechargable battery and solar panel which can charge the battery.
I only want to compare the battery capacities - so please disregard the fact that one of the items is more than just a battery - it is just the battery capacity of each item I am interested in.
http://cgi.ebay.co.uk/Solar-Charger-Battery-for-PC-Laptop-Mobile-Phone_W0QQitemZ280378903393QQcmdZViewItemQQptZUK_Gadgets?hash=item4147e28b61&_trksid=p3286.c0.m14
http://cgi.ebay.co.uk/Extra-laptop-Battery-for-16V-Universal-Li-Ion-133-Watt_W0QQitemZ270438389595QQcmdZViewItemQQptZUK_Computing_LaptopsAccessories_LaptopBatteries?hash=item3ef762575b&_trksid=p4634.c0.m14.l1262
I sat through physics at schools and passed the exams years and years ago but I can’t remember anything and I am so slow it would take me weeks to get back into working things out without confusion.
The capacity of one battery is shown in mAH and the capacity of the other battery is shown in WH. I don’t know how to compare them.
Please help. I’m not so interested in how to work it out right now - just asking for someone to do that - to put the capacities of the 2 batteries in a way that can compare them as exactly as possible (not to rely on the suggestions given by retailers that the battery powers a laptop for 3 hours or whatever). So please can you give the capacity in the same units?
Also, you can explain so I can get around to knowing how it’s worked out when I am more with it - I’d appreciate that a lot.
My laptop would take the input voltage from the power source - 19 volts, or I guess the next selection above that where a battery doesn’t have a 19 volts setting (so that seems to be 22 volts with the battery that’s also a solar charger).
May 15th, 2010 at 9:19 pm
first is listed at 20000 mAH (74W/h) (both numbers are listed)
The second number is presumably 74 watt-hour, as W/h is meaningless.
second is listed at 133 watts one one line, and at 133 Watt/Hours on a different line, which are obvious mistakes, it should presumably be 133 watt-hour.
Just on the numbers, 133 is larger than 74.
But I would not trust the second one, given the two basic mistakes in their ad.
For the first one, it also has arithmetic problems. 20000 mA-hour translates to 20 amp-hour. Multiply by the voltage output of 22 volts to get 440 watt-hours, which is much different from 74 watt-hours.
So, bottom line, neither of the specs make sense, they are riddled with internal errors, so I don’t know which is best, which to believe.
But in general, you can take the amp-hour rating and multiply it by the voltage to get watt-hour (amp x volts = watts).
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