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:
BATBL50L6, LIP6199CMPC
BT.00403.008, BT.00404.008,
BT.00405.006, BT.00603.017,
BT.00604.008, BT.00605.004,
BT.00605.009, BT.00803.015,
BT.00804.012, CGR-B/6F1
This battery is also compatible with the following models :
Acer Aspire 3100 ,Acer Aspire 3102 ,
Acer Aspire 5100 ,Acer Aspire 5102/WLMi ,
Acer Aspire 5110 ,Acer Aspire 5610 ,
Acer Aspire 5612/WLMi ,
Acer Travelmate 4200 ,
Acer Travelmate 4202/WLMi,
Acer Travelmate 4203 ,
Travelmate 2450, 2490, 4200, 4230, 4260, 4280, 5510
Aspire 3100, 3650, 3690, 5100, 5110, 5610, 5630, 5650, 5680, 9110, 9120
Aspire 3100 serie: 3103 3104 3104WLMiB120 3104WLMiB80 3104WLMiB80F
Aspire 3690 serie: 3692 3693 3692WLCi 3693WLMI
Aspire 5100 serie: 5101 5102 5102AWLMiP120 5102AWLMiP80 5102AWLMiP80F 5102WLCi 5102WLMi 5103 5103WLMiP120 5103WLMiP160
Aspire 5110 serie: 5110 5112 5113 5114 5112WLMi 5113WLMi 5114WLMi
Aspire 5610 serie: 5610 5610-2273 5611 5612 5610AWLMi 5611AWLMi 5611ZWLMi 5612AWLMi 5612WLMi
Aspire 5630 serie: 5630 5632 5633 5634 5632WLMi 5633WLMi 5634WLMi
Aspire 5650 serie: 5650
Aspire 5680 serie: 5680 5683 5684 5683WLMi 5684WLMi
Aspire 9110 serie
Aspire 9120 serie
TravelMate 2490 serie: 2490 2492 2493 2492NLMi 2492WLMi 2493NWLMi 2493WLMi
TravelMate 3900 serie
TravelMate 4200 serie: 4200 4202 4202LMi 4202WLMi
TravelMate 4230 serie: 4230 4233WLMi
TravelMate 4260 serie
TravelMate 4280 serie: 4283WLMi

Understanding your ACER TravelMate 2490 3900 4200 BATBL50L6 battery  Needs

What is the run time of  ACER TravelMate 2490 3900 4200 BATBL50L6 battery ?

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.

How can I maximize the performance of my ACER TravelMate 2490 3900 4200 BATBL50L6 battery?

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 ACER TravelMate 2490 3900 4200 BATBL50L6 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.