If HWMonitor is anywhere near correct with the battery capacity, you have a big problem there. It's reporting it as somewhere around the capacity of a smartphone battery. 4 Wh is tiny. Maybe try leaving it open while on battery and see how the current capacity value drops.
I've attached a picture of the readout on my E1705's battery. It's a 1.5 year old 80 Wh/9-cell battery. The wear/charge level reading on it is a bit screwy, I've tried recalibrating the battery a few times but it always shows something like that. Oh well . It was spot-on with the wear level of the original battery. -- KI6RIT