How can I check the power draw of an application?

It would be really handy to troubleshoot battery life issues, right now I'm struggling to keep it to last two days on a single charge, and I ran a calibration after charging it for three hours, the flattened the battery, recharged it for thee hours and the issue persists, so I don't think it's a calibration issue.

I don't receive more notifications than usual either.

Device Type	BANGLEJS2
Firmware Version	2v16.183
Apps Installed	launch (0.20), boot (0.56), widlock (0.08), widalarm (0.01), widmessages (0.04), messages (0.58), agenda (0.13), files (0.08), widbt_notify (0.17), calclock (0.06), widclk (0.07), mylocation (0.09), owmweather (0.02), widslimbat (0.01), weather (0.24), wid_edit (0.02), sched (0.21), qmsched (0.09), alarm (0.38), authentiwatch (0.07), android (0.23), astrocalc (0.04), quicklaunch (0.10), messageicons (0.05), messagegui (0.65), setting (0.58)