Please ensure the product(s) that you are going to buy fits the brand, model and part number of your device.

Specifications:

Battery Type: Li-ion
Color:black
Dimension:267.8X49.4X21.85 mm
Capacity:4400mAh
Volt:14.8V

Replace battery part number:

A42-A3 , A41-A3 , A42-A6
70-NA51B1100,70-NA51B2100,
70-NCG1B1000 ,70-NDK1B1200 ,
70-NFH7B1000 , 70-NFH5B2200 ,
70-NCG1B3000 ,90-NA51B1000,
90-NA51B2000, 90-NA51B2100,
90-NA51B2200 , 90-NA52B2000,
90-NA71B1100,90-NCG1B1000,
90-NCG1B1010, 90-ND01B1000,
90-NDK1B1000,90-NDM1B1000 ,
90-NFJ1B1000, 90-NFL6B2100,
90-NFPCB1001, 90-NFPCB2000,
90-NFPCB2001, 90-NG31B1000,
90-NH73B1000Z , 90-NHJ9B1000Z,
90-NIL1B2000

This battery is also compatible with the following models :

Asus A3 Series:
A3Ac, A3E, A3Fc, A3Fp, A3G, A3H, A3Hf, A3L, A3N, A3Vc, A3Vp
Asus A3000 Series:
A3000, A3000E, A3000G, A3000L, A3000N
A3000 A3000A A3000Ac A3000E A3000F A3000G A3000H A3000L A3000N
A3000V A3000Vc A3000Vp A3500L A3500N A3527 A3527NL A3527N-UH A3800G
Asus A6 Series:
A6E, A6F, A6G, A6J, A6Ja, A6Jc, A6Je, A6Jm, A6K, A6Km, A6Kt, A6L, A6M, A6N, A6Ne, A6R, A6Rp, A6T, A6Tc, A6U, A6V, A6Va, A6Vc, A6Vm
Asus A6000 Series£º
A6000Ga, A6000J, A6000Ja, A6000L, A6000N, A6000Ne, A6000R, A6000U, A6000V, A6000Va, A6000Vc, A6000Vm
Asus A7 Series:
A7C, A7Cd, A7D, A7Db, A7Dc, A7F, A7G, A7Gb, A7Gc, A7J, A7Jb, A7Jc, A7K, A7M, A7Mb, A7Mc, A7S, A7Sv, A7T, A7Tb, A7Tc, A7U, A7V, A7Vb, A7Vc
Asus G1 Series:
G1S
Asus G2 Series:
G2P, G2Pc, G2S, G2K, G2Pb, G2Sg
Asus Z91 Series:
Z91E, Z91ER, Z91G, Z91L, Z91N, Z9100, Z9100E, Z9100ER, Z9100G, Z9100L, Z9100N
Asus Z92 Series:
Z92J, Z92Jc, Z92R, Z92T, Z92V, Z92Vc, Z92Vm
Asus A3500L
Asus A38N
Asus Z8 serie Asus Z81D Z81G Z81K Z8100 Z8100D Z8100G Z8100K Z8100L
Asus Z91 serie
Asus Z91E Z91ER Z91G Z91L Z91N Z9100E Z9100ER Z9100G Z9100L Asus Z9100N
Asus Z92 Series
Asus Z92J Z92Jc Z92R Z92T Z92V Z92Vc Z92Vm

laptop batteries have two main ratings on them: Volts and Amperes. Because size and weight of laptop batteries is limited when compared to larger batteries such as car batteries, most companies show their ratings with Volts and Milliamperes. One thousand Milliamperes equals 1 Ampere. When buying a battery, select batteries with the most Milliamperes (or mAh). Batteries are also rated by Watt-Hours, perhaps the simplest rating of all. This is found by multiplying the Volts and the Amperes together. For example:

14.4 Volts, 4000mAh (Note: 4000mAh is equal to 4.0 Amperes).

14.4 x 4.0 = 57.60 Watt-Hours

Watt-Hours signifies the energy needed to power one watt for one hour. This laptop battery can power 57.60 watts for one hour. If your laptop runs at 20.50 watts, as an example, this laptop battery could power your laptop for 2.8 hours.

There are several steps you can take to help you get maximum performance from your laptop battery:

Prevent the Memory Effect - Keep the laptop battery healthy by fully charging and then fully discharging it at least once every two to three weeks. Exceptions to the rule are Li-Ion batteries which do not suffer from the memory effect.

Keep the laptop Batteries Clean - It’s a good idea to clean dirty battery contacts with a cotton swab and alcohol. This helps maintain a good connection between the battery and the portable device.

Exercise the Battery - Do not leave the battery dormant for long periods of time. We recommend using the battery at least once every two to three weeks. If a laptop battery has not been used for a long period of time, perform the new battery break in procedure described above.

Battery Storage - If you don’t plan on using the laptop battery for a month or more, store it in a clean, dry, cool place away from heat and metal objects. NiCad, NiMH and Li-Ion batteries will self-discharge during storage; remember to recharge the batteries before use.

Upgrade my ASUS 90-NA71B1100 battery from NiMH to Li-Ion

NiCad, NiMH and Li-Ion laptop batteries are all fundamentally different from one another and cannot be substituted unless the laptop has been pre-configured from the manufacturer to accept more than one type of battery chemistry. Please refer to your manual to find out which rechargeable battery types the laptop device supports or use our Battery Finder above to find all the compatible laptop batteries for your device. It will automatically list all of the battery chemistries supported by your specific device. If your device does allow you to upgrade the battery from NiMH to Li-Ion, you will typically get longer run times.

For example, if your laptop uses a NI-MH battery that is 9.6 Volts, 4000mAh and the new li-ion laptop battery is 14.4 Volt, 3600mAh, then you will obtain longer run time with the li-ion battery.

Example.

Li-Ion: 14.4 Volts x 3.6 Amperes = 51.84 Watt Hours
Ni-MH: 9.6 Volts x 4 Amperes = 38.4 Watt Hours
The Li-Ion is stronger and has longer run time.