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:  
Dimension:  
Capacity:  4000mAh
Volt:  11.1V
Replace battery part number: 
442677000001 442677000003
442677000004  442677000005 
442677000007  442677000010
442677000013  442682800001
442682800002 442682800004
442682800008 442682800014
442682800015 442682800018
442682800027 442682800030
442682840004 442683000001
6903120000 7001820000
7009510000 7018440000 
7018840000  7038840000 
40006825  3CGR18650A3-MSL
BT.T3004.001 BT.T3007.003 
BP-LYN 4000 BP-LYN 
BP-CAL L6P-CG0511
BP-8089 8089P
8089X  8389
8889 
 
This battery is also compatible with the following models : 
Mitac
Mitac MiNote 8889
 Mitac MiNote 8389
 Mitac MiNote 8089 
Mitac MiNote 8089P
 Mitac MiNote 8089C   

NEC
NEC Versa E680 NEC Versa M500   

Packard Bell Packard Bell Easy Note MIT-NYN0Z , MIT-LYN01 MIT-LYN02 MIT-LYN08 , MIT-CAI0 ,MIT-CAI02 Series,
Packard Bell Packard Bell Easy Note E series

Packard Bell Easy Note E1 series
Packard Bell Easy Note E1245 E1260 E1280 E1510

Packard Bell Easy Note E2 series
Packard Bell EasyNote E2 E2311 E2363

Packard Bell Easy Note E3 series
Packard Bell Easy Note E3204 E3208 E3215 E3220 E3225 E3227 E3228 E3240 E3242 E3244 E3245 E3246 E3248 E3250 E3255 E3256 E3258 E3265 E3266

Packard Bell Easy Note E4 series
Packard Bell Easy Note E4 E4710

Packard Bell Easy Note E5 series
Packard Bell Easy Note E5138 E5140 E5141 E5142 E5145 E5146 E5147 E5151 E5151LE E5155SE E5285 E5412

Packard Bell Easy Note E6 series
Packard Bell Easy Note E6310 E6307 E6300 E6037 E6000 E6290 Series

Advent MiNote 8089, 8089P, 8389, 8889 Series;

Medion
MD42100 MD95062 MD95135 MD95144 MD95190 MIM2040 MIM2050 Series;

Gericom Bellagio
8089 1440 1540 Series;

Fujitsu-Siemens Amilo K7600 Series

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 BenQ JoyBook 2100e R22 R23 BP-8089X BP-8889 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.