Power Manager Setting To Preserve Battery Life When Using A Docking Station

I have a Lenovo Thinkpad X220 which is about 19 months old.  When at work, the computer is in a Lenovo docking station.  At the end of the day, it is removed and any further evening use is typically on the battery.
Yesterday, the battery symbol in the tray at the bottom of the screen displayed a red X on it and indicated that there was an "error".  I presume from this that that battery is dead and needs to be replaced.  I am surprised by the comparatively short life of this battery.
I was thinking that perhaps the use of the powered docking station played some role in shortening the battery's life.  For example, it may have repeatedly overcharged the battery.
Is there a Power Manager setting that will reduce the likelihood that the battery is being overcharged while in the docking station?  In the future, is it feasible to simply remove the battery before inserting it into the docking station so that this won't continue to occur?
Thank you.
(I did a search of the community's knowledgebase, but didn't find anything on point.)

Hi,
Welcome to Lenovo Community Forums!
I’m sorry to hear that battery of your Lenovo ThinkPad X220 had undergone wear and tear and has to be replaced.
Capacity of a battery declines as the battery ages, with the number of charge cycles and time at high temperature. Under average usage patterns your battery maintains approximately 70% of its power capacity after the first year of operation.
Most laptops today use lithium Ion (Li-ion) batteries. Overcharging Li-ion batteries is not a problem and does not affect the battery life span. These batteries have an internal circuit to stop the charging process at full charge. This is why the Li-ion batteries are more expensive. The only way for the Li-ion battery to overcharge is if the charging system malfunctions, and then the battery will heat up while in the charger. Older laptops use Nickel-cadmium (Ni-Cd) and Nickel Metal Hydride (Ni-MH) batteries. They require more maintenance than Lithium Ion batteries. They must be fully discharged and then fully recharged so that they don't lose battery life.
Refer this document to see the tips on how to increase the battery life.
Hope this provided enough clarity for your query!
Best regards,
Mithun.
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