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Battery charge suddenly drops from about 25% to 6%
Laptop shuts down when battery meter is relatively full. When I plug in and reboot, battery meter correctly says 1% and charging

I have a new laptop battery that I charge to 100% and then discharge to 50% and charge again as Li-ion batteries should not be totally discharged.

However, today I noticed that after it showed 100% and I unplugged it, it jumped to 94% in a split second.
The moment I put it back in charge, it showed me a 100% again.

What could be causing this jumping?
Additionally, what I also observed was that I had left my laptop at 44% charge when I shut it down and when I restarted it, it was at 6%.

Laptop: HP Pavilion DV4-2126TX.
OS: Windows 7 Home Premium 32-bit.

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marked as duplicate by Ƭᴇcʜιᴇ007, Sirex, Sathya Jan 13 '13 at 19:29

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Sounds like a faulty battery. If it's 'new' take it back. If it's a no-name battery, consider contacting the notebook manufacturer for a validated replacement battery. –  Ƭᴇcʜιᴇ007 Jan 13 '13 at 16:40
    
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