How long should a 6 cell laptop battery last?

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How long should a 6 cell laptop battery last?

Postby radicht » Sun Nov 04, 2007 3:30 pm

Hi, I am trying to figure out if I need to buy a new battery, or if this is standard...

I have a HP DV6102OD laptop that has a 6 cell battery. Right now, my computer lasts about an hour on a charged battery. Is this typical?
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Postby ssamurai26 » Sun Nov 04, 2007 3:47 pm

1 hour is probably not typical, but it`s impossible to say how long it should last. Depends on how the computer is being used, what components it has, how old the battery is, etc.
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Postby Karlsweldt » Sun Nov 04, 2007 4:07 pm

Depends on the type of cells in the battery, and how they were initially charged. The older Ni-Cad type cells were notorious for developing a "memory" of charge/use cycles, and would provide only about 1/3 of their duty cycle if not fully discharged before each recharge. The newer NiMh type battery doesn't have those "memory" problems, but they do require a few initial charge/discharge cycles to come up to full expectancy. The Li-Ion type are less prone to problems also, but they too require a few initial charge/discharge cycles to become fully reliable.
Almost all of the rechargeable batteries have cells rated at 1.2 volts. Common flashlight batteries and Alkaline types are rated at 2.0 volts.
It is the nature of the chemical structure that determines the voltage/current.

The battery may be older than a year, which would indicate its life expectancy is dwindling. The battery will endure only so many cycles of use.
Another reason for poor battery life is the charger/power pack itself. It will provide more voltage than the battery needs, but only slightly. That is to ensure the battery does come to its full reserve. If the cells become too warm when charging, an internal thermal fuse may open, for safety.

But regardless of how "new" the battery is, it is still possible that one cell may have gone bad. See if there is any manufacture date on the label, and if it is still under warranty.
If not, then perhaps careful separation of the case may reveal the problem. It is not overly difficult to replace one cell in a battery that is hard to find.
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Re: How long should a 6 cell laptop battery last?

Postby Copper » Sun Nov 04, 2007 5:00 pm

radicht wrote:Hi, I am trying to figure out if I need to buy a new battery, or if this is standard...

I have a HP DV6102OD laptop that has a 6 cell battery. Right now, my computer lasts about an hour on a charged battery. Is this typical?


an 1hour to 1 1/2 hours is typical for this laptop. the 6 cell Lithium-Ion battery is the standard battery supplied with this laptop
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Postby Karlsweldt » Mon Nov 05, 2007 3:07 pm

If Copper is correct, then that particular laptop model isn't meant for portability or long use without AC power! Sort of defeats the laptop purpose.
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Postby kevinloh » Mon Nov 05, 2007 6:05 pm

I fully agree with Karlsweldt regarding the chemistry of batteries correlates to the performance of the batteries. We have come a long way from various battery technologies from Lead Acid to Li-Ion Polymer, with the latter having superb volumetric energy density. Perhaps Nuclear batteries would be common in the future.

It is becoming increasingly common to see some people actually physically remove the Li-Ion battery from their laptops once the battery charged green LED lights up.

It is said to prevent premature failure of the Li-Ion battery due to prolonged charging (some less than a year for a newly bought battery) or a defect in the laptop's battery charging mechanism to stop charging after the battery has been fully charged.

Anyone who actively and also those who do not practice this method? Kindly share your experience on this. Perhaps this could be a way to extend the life of Li-Ion as much as possible. Typical lifetime for Li-Ion battery is about 3 years.
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Postby Copper » Tue Nov 06, 2007 3:01 am

Karlsweldt wrote:If Copper is correct, then that particular laptop model isn't meant for portability or long use without AC power! Sort of defeats the laptop purpose.


i checked with HP. as i use HP laptops

the most Ive seen from a laptop battery is 2hrs 15 Min's. it is recommend that a laptop is used on an ac power adapter. or you carry spare batteries with you. you should should also set a power scheme in the setting to prolong the life of the battery. most laptops have power usage of around 90watts . so don't expect to much from the batteries when in use. laptops when invented to be a portable means of computing not a continues means. in other words do what you got to do in the shorts possible time.

there are high capacity battery available , but the manufactures will aways fit the cheapest option
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Postby Mr T » Tue Nov 06, 2007 5:00 am

Aye, depends on what you are doing etc... The usual life I have had out of a battery playing DOOM3 on my laptop was 30 minutes... Other than that it was no more than an hour and a half... These days laptops are designed in mind of being close to an AC power supply... Also they use a lot more powerr hungry components, ie faster CPU's and bigger hard drives, not forgetting bigger LCD screens....
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Postby Plekto » Tue Nov 06, 2007 4:29 pm

The battery life that they rate it at is usually with no backlighting, maximum power saving options, and so on. With backlighting, normal settings, and your various usb devices and such plugged in, yeah.. 2 hours is about normal. A lot of people toss the DVD drive on trips and put in a second battery.
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Postby TriAngle » Fri Nov 09, 2007 4:58 am

I just bought a new battery for my Vaio laptop. My original was a Sony Li-Ion PCGA-BP1N 1700mAh which sucked at about 30 minutes before draining on a full charge. They wanted around $150 for a new one just like it. I got a Dekcell Li-Ion PCGA-BP71 4400mAh which lasts about 3.5 hours for $48 including Shipping from Amazon via Battery_Direct.
Should have bought this baby years ago.
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