Life of laptop battery

[Mr-H]

Just wondered - how long would you expect a laptop to run on battery power? I have just bought a new one, made sure it was 100% charged, and powered the laptop up whilst still on mains, then unplugged the charger. After less than 30 minutes I had screen messages saying 5% power left. Does this sound about right, that you would only expect something like 30 minutes from a battery before charging?

[Giggsie]

mine runs about 3 hrs on full charge used to be about 3 1/2 when new.

[jomifl]

It should say in the manual, but between 4 and 8 hours is normal.

[Purple_Popple]

In all the laptops I've had from new, I have never had one last over 3 hours on battery alone.

[vivandorron]

Depends what laptop you have. You say you have bought a new one...Is that reference to battery or laptop.? Does your operating manual say anything about operating on battery and an approximation of the time it will last before a re-charge could be necessary.? Some computers have batteries which can last up to 6 hrs. As an average I would have thought two to three hours.

Ron.

[jomifl]

Click on the power icon and choose economy, it may run a bit slower some of the time but your battery should last longer. Also turn down the screen brightness as much as is bearable.

[squarebear]

It varies but should say in the manual. One I bought once only lasted 1 hour.

[wildwood]

Try charging it up to maximum and discharging by running a DVD. Then again. If after that you don't get more than at least 2 hours, it is probably a crook battery and should be taken back for a refund/replacement.