This is an extended run battery which has twice the capacity of the original 4 cell battery. The additional capacity of this battery will cause the battery pack to extend about 1 inch to the rear of the laptop. Of course the great thing about extend run batteries is that they will power your tablet twice as long as the standard battery.
Note: this battery is for the X200 and X201 Tablet models. If you have a X200 or X201 Laptop, you will need a different battery. This brand new Lenovo X200 X201ThinkPad Replacement tablet battery features lithium-ion cells. Li-ion battery technology provides longer run times with less weight. In addition, Li-ion batteries are not subject to the memory effect common with older battery technology. The 8 cells inside this battery pack are double the original 4 cell battery pack. This laptop battery is individually tested and backed by a 2 Year warranty. You will not be able to use the UltraBase docking station with this battery as the added capacity will prevent the tablet from locking in.
You can expect about 4 hours to 4-1/2 hours of run time with this computer battery when new, depending on your energy use.
Like all Li-ion primary batteries, your run time will decline over time.
This battery is specifically designed for the Lenovo ThinkPad X200 X201 Tablet Battery.