I have purchased an after market battery as my old battery would only hold a charge for 1/2 hour. The part numbers match exactly the only difference is my old one says 7800mAh the new one 7200. The supplier has said it will work fine. Once installed the battery light flashes rapidly and it works the pc but is not charging.
MAh denotes the amount of current the battery requires for its charging.... Thus.. the battery works out ur system but it will not charge.. ubetter replace ur new battery or get ur money back... the VAIO is not designed for so much adaptability....
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If thelaptop battery is more than 3 - 4 years old then the battery could be worn out.Rechargeable batteries have a finite number of charge and discharge cycles andwill lose their charge capacity over time, i.e. won't charge to 100% andgradually the charge reduces until the battery won't charge up at all. OR Thebattery shows a 100% charge but when the adapter is disconnected the batterydrops off to zero capacity in a very short time. If the battery drops to anunacceptable charge level then the battery needs to be replaced.
I should think either the battery is flat and needs a while to get going or there is a problem with the battery. Leave it charging for a few hours to see if it initialises correctly. If the battery is below a threshold voltage, the uProcessor in your laptop will think there is a problem and not let it start.
If the battery is not a Sony battery but an equivalent, the Sony may not recognize it as there is not the specified "bit" of information built in to it. It maybe just totally flat in which case it will take a number of hours on charge to get it recognized. The BIOS upgrade must be done with a good battery fitted and the AC Adapter working otherwise if the power fails whilst loading, you cannot recover the BIOS again.
did you charge it for 24hrs prior to using it? usually when you purchase a new laptop the battery has 10% life and its recommended that you charge it for 24hrs before using it so that the battery has a chance to break in.