What happened to my battery?? Charges too fast - lasts 25min

I just bought the new 15in PB about a month ago. Everything has been working fine until now. The battery only gives me 25 min of power. I calibrated the battery over and over. When I charge the battery, it one, charges way too fast, and two, for example, I have 43% of life left and it says I have 10min left. I take it this is a software problem. If anybody knows how to help me, please do. Thanks so much.

How about this. I had the exac same thing happen on my new PB after a few weeks of use. I tried the PMU reset twice last night to no avail. I recharged my battery over night, this morning I disconnected the power adapter and sure enough she started to drain right before my eyes. In 20 min she was empty and shut down. I left her off packed the Pb in my bag and went to work intending to call apple care and arrange for a replacement battery. I called Apple went through the regular stuff, obtained a number and was instructed to head into the nearest apple store for replacement battery. I had read someone that I should check my Pb with another battery, so I borrowed my work collegues PB, last generation, and swapped batteries, Ok his battery in my PB was great, System profiler showed that his battery had a full charge capacity of some 4000 mAh's. I then checked my battery in his PB and his system profiler showed mine as having a charge of some 4500 mAh's! before my battery in my PB showed only some 300mAh's. I reinstalled my battery into my PB and for some reason it now shows a full charge as 4451mAh's and it's acting correctly too. nw down to about 57% of charge after a few hours. I'll have to watch this over the next few days.

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Battery drains too fast

Hello
I have this macbook air since now a year.
he always had a battery life time of about 9 up to even 12 hours, even on high usage.
until i needed a new charger and the macbook seller sold me a macbook pro charger (85 watt)
suddenly i only have 4 up to 8 hours battery lifetime (according to the announce at to p of screen beneath the battery sybolo on desktop)
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suddenly i (even without any apps open) have maybe 3 hours lifetime left on full charged battery
it states : 8 hours, 10 minutes later: 6 hours, 20 minutes later: 5 hours etc.
here are the details of the battery:
(translated form german, sorry, but this should not affect the "understandability" of the data:
(they are taken during usage in battery usage)
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Full Load Capacity (in mAh): 4727 (was always around 5000 mah since i bought it)
Amount of charging cycles : 307
State: Good
Voltage (in mV): 8223 (was always way lower, since i bought it, around 5000 and 6000 mah)
I alwas use the charger (plugged in usage) although sometimes i don't.
I am "upset" about the different advices the give in the net about Mac batteries:
once we should NEVER let them under 50% charge
once they talk about calibrate the battery by exactly let them drain and keep it for even 5 hours "empty"
then again they state to use battery always down to low percent and recharge it...
I use since a short time a 85 W charger form Macbook pro, but net and MAcstore sellers state both this should not ale any issues
I'm wondering what happened to the battery, if there is some way to "become" back what i had before, a battery that worked at least 8 hours under "high pressure"
Can anybody help?
Go to apple shop does not come into question as in argentina this si like going to macdonalds and try to get a roast beef.
change the battery: impossible in macbook air.
Is my battery broken after not even 400 cycles and this without any reason?
i don't run any process (hidden) i checked with activity manager
i don't have stuff memorized on clipboard.
almost all data (without adobe programs and default mac programs) are stored on external disk.
i run almost only native mac programs.
Thank you!!!
Seriennummer:
ull

hello
thank you for the tip
i did a SMC reset, after all the other suggested steps.
result is a even lower battery life time, by 88% battery charge: 4 hours 12 minutes remaining, with no apps running.
I must say i have also upgraded to yosemite OS X 10, but since when should such a minimalistic and honestly downgrading OS decrease the life of a battery that hard?
I checked the battery status etc again, and this changed (to worse) as well:
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What happened to my battery?? Charges too fast - lasts 25min

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