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: dark grey
Dimension: 273.95x73.00x21.40 mm
Capacity: 4400.00 mAh
Volt: 14.8V
Replace battery part number:
909-2420 91.49V28.001
BT.00803.004 BT.T3004.001
BT.T3007.001 BT.T3007.003
BTP-58A1 BTP-59A1
BTP-60A1 BTP-84A1
BTP-85A1 LC.BTP01.003
LC.BTP03.002

This battery is also compatible with the following models :
Acer Aspire 1360 Series
Aspire 1360LC, Aspire 1362, Aspire 1362LC,
Aspire 1362LCi, Aspire 1362LM, Aspire 1362LMi,
Aspire 1362WLC, Aspire 1362WLCi, Aspire 1362WLM,
Aspire 1362WLMi, Aspire 1363, Aspire 1363LC,
Aspire 1363LCi, Aspire 1363LMi, Aspire1363WLCi,
Aspire 1363WLM, Aspire 1363WLMi, Aspire 1365,
Aspire 1365LCi, Aspire 1365LMi

Acer Aspire 1520 Series
Aspire 1520LMi, Aspire 1521, Aspire 1521LCi,
Aspire 1521LMi, Aspire 1522, Aspire 1522LC,
Aspire 1522LMi, Aspire 1522WLM, Aspire 1522WLMi,
Aspire 1523, Aspire 1523LMi, Aspire 1523WLM,
Aspire 1523WLMi, Aspire 1524, Aspire 1524LMi,
Aspire 1524WLM, Aspire 1524WLMi

Acer Aspire 1610 Series
Aspire 1610LM, Aspire 1612, Aspire 1612LM,
Aspire 1612LMi, Aspire 1613, Aspire 1613LC,
Aspire 1613LM, Aspire 1613LMi Acer

Aspire 1620 Series
Aspire 1620, Aspire 1620LC, Aspire 1620LMi,
Aspire 1621, Aspire 1621LC, Aspire 1621LM,
Aspire 1621LMi, Aspire 1622, Aspire 1622LC,
Aspire 1622LM, Aspire 1622LMi, Aspire 1622WLM,
Aspire 1622WLMi, Aspire 1623, Aspire 1623LM,
Aspire 1623LMi, Aspire 1624, Aspire 1624LM,
Aspire 1624LMi, Aspire 1624WLM Acer

Aspire 1660 Series
Aspire 1660WLMi, Aspire 1661, Aspire 1661LM,
Aspire 1661LMi, Aspire 1661WLC, Aspire 1661WLCi,
Aspire 1661WLM, Aspire 1661WLMi, Aspire 1662,
Aspire 1662LC, Aspire 1662LM, Aspire 1662LMi,
Aspire 1662WLM, Aspire 1662WLMi, Aspire 1663,
Aspire 1663LM, Aspire 1663LMi, Aspire 1663WLM,
Aspire 1663WLMi, Aspire 1664, Aspire 1664LM,
Aspire 1664LMi, Aspire 1664WLCi, Aspire 1664WLM,
Aspire 1664WLMi

Acer Aspire 3010 Series

Acer Aspire 5010 Series
Aspire 5012LMi, Aspire 5012WLMi, Aspire 5014LMi,
Aspire 5014WLMi Acer Extensa 2000 Series
Extensa 2000, Extensa 2001LC, Extensa 2001LM

Acer Extensa 2500 Series
Extensa 2500, Extensa 2501FLC, Extensa 2501LC,
Extensa 2501LM

Acer TravelMate 240 Series
TravelMate 242FX (MS2138), TravelMate 242LC, TravelMate 242LCi,
TravelMate 242LM, TravelMate 242LMi, TravelMate 242X,
TravelMate 242XC, TravelMate 242XM, TravelMate 243LC,
TravelMate 243LCH, TravelMate 243X, TravelMate 243XH,
TravelMate 243Xi, TravelMate 244LCi, TravelMate 244LC-XPP

Acer TravelMate 250 Series
TravelMate 250LC, TravelMate 250LCi, TravelMate 250PE,
TravelMate 250PEXC, TravelMate 252ELC, TravelMate 252ELCi,
TravelMate 254ELCi

Acer TravelMate 2000 Series
TravelMate 2001, TravelMate 2001FX, TravelMate 2001LC,
TravelMate 2001LCe, TravelMate 2001LCi, TravelMate 2001LM,
TravelMate 2001LMe, TravelMate 2001XC, TravelMate 2003,
TravelMate 2003LC, TravelMate 2003LCe, TravelMate 2003LM,
TravelMate 2003LMe

Acer TravelMate 2500 Series
TravelMate 2500, TravelMate 2500LC, TravelMate 2501,
TravelMate 2501LC, TravelMate 2501LCi, TravelMate 2501LM,
TravelMate 2501LMi, TravelMate 2501XC, TravelMate 2502,
TravelMate 2502LC, TravelMate 2502LCi, TravelMate 2502LM,
TravelMate 2502LMi, TravelMate 2503, TravelMate 2504,
TravelMate 2504LC

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 ACER BTP-58A1 BTP-59A1 BTP-60A1 BTP-84A1 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.