In a second test, using the machine without
external power, the warningless shutdown happened
at about 25% charge level.
From: Richard Smith <[hidden email]>, Tue, 1 Mar 2016 21:45:14 -0500
> As others have said your battery is probably just showing its age. 1.5
> was built in 2010-2011 so unless you got a new battery its 5 or so years
The machine was used when I purchased it about
three years ago. Likely the battery was original
then and I have not replaced it since. Yes, this
is probably the factory original battery.