I had a similar issue myself, compounded by the fact that no current manufacturer makes a laptop with a decent screen (matte, 16:10 or 3:2), decent keyboard (nice key travel and feel), and decent trackpad (not too big, ideally with discrete buttons). Some laptops have one or two of these, but I'm yet to find a modern one with all three.
In the end, I upgraded my old 2010 ThinkPad X201 (now has 8GB of RAM and a 256GB SSD) and bought a new battery for it.
EDITED: 10 Mar 2018 09:58 by DAVE!!