New laptop is due shortly 
So waht to move on the old one, but trouble is that the battery is only lasting 20 mins max.
In my vaio FW21L the battery is 4400mAh 11.1v with a code of VGP-BS13/S
The vaio is running W7 which seems to mean that it will not work with some 3rd party batteries, and others that I have looked do not say one way or the other.
Nearest battery that I have found appears to be from a VGN-FW21Z, Battery Model No: VGP-BPS13A/S, Volts: 11.1 Capacity: 4800mAh
Most appreciate if someone can tell me if this will drop in my current machine?
So waht to move on the old one, but trouble is that the battery is only lasting 20 mins max.In my vaio FW21L the battery is 4400mAh 11.1v with a code of VGP-BS13/S
The vaio is running W7 which seems to mean that it will not work with some 3rd party batteries, and others that I have looked do not say one way or the other.
Nearest battery that I have found appears to be from a VGN-FW21Z, Battery Model No: VGP-BPS13A/S, Volts: 11.1 Capacity: 4800mAh
Most appreciate if someone can tell me if this will drop in my current machine?
