Laptop turns off when charger unplugged...

[#1]

Charge indicator says full (100%) yet as soon as I unplug the charger it turns off. No notice of low battery power or indication that is is shutting down.
I have run full AV scans with nothing found so am looking at what are the possible causes and a fix.
The laptop is a Toshiba Satellite Pro C660.
The laptop is just over two years old and I regularly (every few months) allow the battery to completely drain.
Edit: I have checked power settings and they all seem correct.
Any advice, please?

[#2]

Can you check the battery condition using a multimeter?
Replacements on ebay are from about £16 inc postage
http://www.ebay.co.uk/sch/i.html?_from=R40&_sacat=0&_nkw=Toshiba+Satellite+Pro+C660+battery&_sop=15.

[#3]

That's odd. My old Toshiba of several years the battery would still last 15-20 minutes.
I guess you have checked all the contacts are clean etc.

[#4]

@shutter Don't have a multimeter.
@billnotben I will check and clean contacts shortly.
As the laptop is from the OU I am only responsible for theft/loss otherwise the company that supplied it will either repair or replace it. I was hoping it may be something I could resolve without having to contact them.

[#5]

Quote from: Mav

The laptop is just over two years old and I regularly (every few months) allow the battery to completely drain.

Modern Lithium Ion and Lithium Polymer batteries don't need to be deep-discharged and recharged like that, it's actually quite bad for them, in ye olde beige-box days when laptops used big NiCad batteries, a Discharge-Recharge cycle was good for them to prevent the battery memory effect, but these days it's not needed...
Couldn't say if the battery is at fault or not though, you need to substitute a known working battery with the one you presently have, if it shuts down still, it's the battery circuit inside the laptop, if it keeps running, the old battery is goosed...

[#6]

Quote from: Mav

@shutter Don't have a multimeter.

find a small 12 volt bulb... ( car side light,  12volt led ... )... fix two insulated wires to the contacts... bare the ends of the wires.... touch one to one contact on the battery, and then the other to other contacts in sequence, ( if more than two contacts on battery)... if the bulb lights and then dims... the battery is duff... if the bulb doesn`t light,....then the battery is duff, or you have the wrong sequence of connections...  be careful not to have too much bare wire on the "prod" ends, so you don`t short circuit by accident.... ! .

Others may disagree on this procedure..... ! ..

[#7]

Or connect the two bits of wire to your tongue.
You will notice if there's any voltage present. 

[#8]

Do not do that.... people have died because they tested 9volt batts that way... 

[#9]

They have? 
Were they licking 9V batteries that had been linked into a chain so they produced 180 Volts DC? If they were then they were numpties...

[#10]

Yes, they have... I can`t remember where I heard or saw it.... because it was a few years ago......

Maybe it was a Daily Mail story........   

[#11]

Quote from: shutter

Maybe it was a Daily Mail story........

It does have a whiff of Daily Fail about it (similar to bovine, but with a corporate hint of wrinkly old new zealander thrown in), I do know that kids swallowing button cell batteries can be damaging, but not licking 9v batteries,....
I'm proof of that fact that licking them is not lethal, I've licked them many times in my life, might explain a few things about my personality though....

[#12]

I did see a report a while ago, but it related to someone piercing the skin with probes from a low voltage battery (thereby removing that resistive element) and suffering a heart attack - IIRC it related to a US military "electronics trainee". May try locating it later!!!
Edit: think it was this item
It's probably on a par with the story from a REME colleague story of someone calculating an OC71 transistor was capable of handling a MW (slide-rules have a lot to answer for )

[#13]

Back to the OP....
I have contacted the company that supplied the laptop and, after ensuring that it starts without the battery connected (which it does), it has been deemed that the battery is worn out rather than faulty.
Not going to argue on this as the Open University will pay for the replacement which should be with me in a couple of weeks depending how long the paperwork takes.

[#14]

Quote from: PeeGee

I did see a report a while ago, but it related to someone piercing the skin with probes from a low voltage battery (thereby removing that resistive element) and suffering a heart attack - IIRC it related to a US military "electronics trainee". May try locating it later!!! Edit: think it was this item It's probably on a par with the story from a REME colleague story of someone calculating an OC71 transistor was capable of handling a MW (slide-rules have a lot to answer for )

Not to mention that the internal resistance of the battery will reduce the voltage applied to the curious sailor. 

[#15]

Just received a letter from the OU to say that a replacement battery is on it's way to me - from the original supplier @ £138 inc VAT
They can be bought new online for around £40-£50!