Newest ASUS N50 N51 Battery

Battery Type:  Li-ion 
Voltage:  11.1V
Capacity: 4800mAh / 6Cell
Weight:  337g
Property: ASUS Replacement Battery
Color: Black

Compatible original Battery Code:
ASUS:
90-NQY1B1000Y 90-NQY1B2000Y A32-N50 A33-N50  

Fit machine:
ASUS N50 Series
ASUS N50VC Series
ASUS N50VC-B3WM ASUS N50VC-FP021C ASUS N50VC-FP008C
ASUS N50VC-FP035G ASUS N50VC-FP044C ASUS N50VC-FP106C
ASUS N50VC-FP125C ASUS N50VC-FP154C ASUS N50VC-FP164C
ASUS N50VC-FP168C ASUS N50VC-FP190C ASUS N50VC-FP192C
ASUS N50VC-FP212E ASUS N50VC-FP216E ASUS N50VC-FP222E
ASUS N50VC-FP233E
ASUS N50VN Series
ASUS N50VN-A1B ASUS N50VN-B1B ASUS N50VN-C1S
ASUS N50VN-C2S ASUS N50VN-D1 ASUS N50VN-FP024G
ASUS N50VN-FP154C ASUS N50VN-FP229E ASUS N50VN-T9550
ASUS N50VN-X5A ASUS N50VN-X6 etc

ASUS N51 Series
ASUS N51 ASUS N51A ASUS N51S
ASUS N51TP ASUS N51V ASUS N51VF
ASUS N51VF-A1 ASUS N51VF-X1 ASUS N51VF-X2
ASUS N51VG ASUS N51VN ASUS N51VN-A1
ASUS N51VN-X1A

Tips:
What Are the Best Ways to Keep Your ASUS N50 Battery Going for a Longer Duration?
The most effective ways of increasing the life span of your battery are the following:
Make the screen of your laptop dim
Decrease the number of programs running in the background
Cut down on the external devices
Defrag regularly
You can add more RAM
The external devices like USB devices and WiFi generally take a toll on your ASUS N51 Battery. Remove them when you don’t require them for use and then charge your laptop. This will also help in increasing the life of the battery.