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

I just recently received a 9 cell 27++ battery for my T510. I've never seen this kind before - it attaches to the bottom of the laptop. If I try to use it instead of a 55++ battery, the laptop receives no power.

Do I have to have both batteries in place for it to work? (I don't have both, so I wasn't able to try this myself.)

share|improve this question
up vote 1 down vote accepted

Yes. A 27++ battery is a "slice" battery for extending the laptop's life beyond the 55++ already installed.

share|improve this answer

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.