Windows 8+ has a similar feature built in, to generate your battery report you just need to go enter powercfg /batteryreport in cmd Windows 7 can also generate

Windows 8+ has a similar feature built in, to generate your battery report you just need to go enter powercfg /batteryreport in cmd Windows 7 can also generate power reports (powercfg -energy) but it's a little less human friendly Unfortunately for me it appears that installing windows 10 reset the stats, as my report only goes as far back as about a week after I installed windows 10.