Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

My laptop is a Toshiba Satellite L640. If I remove the laptop charger, my laptop will instantly die, so I can only use the laptop whilst plugged in.

What can I do to fix this?

share|improve this question
… buy a new one? Get a free replacement if it's still under warranty? Batteries are not meant to live forever. – slhck May 30 '12 at 8:26
what the price of a new battery? – dechie May 30 '12 at 8:33

Most likely, your battery is dead. Batteries have a limited lifetime – or, more precisely, a limited number of full charges until their condition becomes worse.

At some point, your battery may fail to sustain power for even a couple of minutes. Or, they may fail entirely. This is not unusual, it's just a sign that you need a new one.

If your laptop is still under warranty (check if there are separate warranty conditions for batteries!), you can get a free replacement. Other than that, your only option is to buy a new one for around $70 to $100 (you're looking at the battery model LTPTB073 for your laptop).

share|improve this answer
yes, i think so too. But unfortunately, the warranty for my laptop has been a long time has expired. To buy it, do I have to buy the exact same type of battery with the previous one. Thank you. – dechie May 30 '12 at 9:08
Yes, you need to buy the same battery type like the one you had. – slhck May 30 '12 at 9:10

there may be a problem on your laptop battery. I've been there on my vaio laptop VGN-FZ140E. I eventually replace my laptop battery because the warranty is not valid. after I replace the battery problem is not there anymore and my laptop back to normal.

share|improve this answer
yes, I will try to replace my laptop battery. I hope your advice can work on my laptop. :) – dechie May 30 '12 at 9:32

Either something inside the laptop is broken, or, more likely, the battery has worn out. For a new battery, if not under warranty, you're looking at around the £100.

share|improve this answer
yes, maybe it's a constraint on my battery. I will soon try to replace my laptop battery. but I still have to save up to buy a new battery. thanks for your suggestions.. :) – dechie May 30 '12 at 9:39

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.