161 is the battery...163 is the time and date...new CMOS battery probably needed.
Manual is here on the Lenovo/IBM site...gives error codes and how to fix.
http://tinyurl.com/37falw
becca, March 2007
Your ThinkPad is losing its eetup information, prnbably due to a flat CMOS battery. If you to www.lenovo.com (Lenovo own all of IBM's PC assets now.) and download a maintenance manual you will find out how to fix it there.
