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:  5200mAh
Volt:  10.8V
Replace battery part number: 
40Y6797 40Y7659
40Y7660 40Y7699
40Y7700 40Y7710
40Y7711 92P1104
92P1106 92P1109
92P1110 92P1114
92P1153 92P1155
92P1157 92P1159
 
This battery is also compatible with the following models : 

IBM
IBM ThinkPad Z61e,
IBM ThinkPad Z61p

IBM ThinkPad R60 Series
ThinkPad R60 9455, ThinkPad R60 9456,
ThinkPad R60 9457, ThinkPad R60 9458,
ThinkPad R60 9459, ThinkPad R60 9460,
ThinkPad R60 9461, ThinkPad R60 9462,
ThinkPad R60 9463, ThinkPad R60 9464

IBM ThinkPad R60e Series
ThinkPad R60e 0656, ThinkPad R60e 0657,
ThinkPad R60e 0658, ThinkPad R60e 0659

IBM ThinkPad T60 Series
ThinkPad T60 1951, ThinkPad T60 1952,
ThinkPad T60 1953, ThinkPad T60 1954,
ThinkPad T60 1955, ThinkPad T60 1956,
ThinkPad T60 2007, ThinkPad T60 2008,
ThinkPad T60 2009, ThinkPad T60 2613,
ThinkPad T60 2623, ThinkPad T60 2637

IBM ThinkPad T60p Series
ThinkPad T60p 1951, ThinkPad T60p 1952,
ThinkPad T60p 1953, ThinkPad T60p 1954,
ThinkPad T60p 1955, ThinkPad T60p 1956,
ThinkPad T60p 2007, ThinkPad T60p 2008,
ThinkPad T60p 2009, ThinkPad T60p 2613,
ThinkPad T60p 2623, ThinkPad T60p 2637

IBM ThinkPad Z60m Series
ThinkPad Z60m 2529, ThinkPad Z60m 2530,
ThinkPad Z60m 2531, ThinkPad Z60m 2532

IBM ThinkPad Z61m Series
ThinkPad Z61m, ThinkPad Z61m 0672,
ThinkPad Z61m 0673, ThinkPad Z61m 0674,
ThinkPad Z61m 9450, ThinkPad Z61m 9451,
ThinkPad Z61m 9452, ThinkPad Z61m 9453
 

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 5200mAh IBM ThinkPad 40Y6795 40Y6797 40Y6799 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.