If you own a smartphone that's older than a year, it is possible the battery health has degraded noticeably. Unfortunately, smartphone batteries don't last forever. To tackle this, you need to be smart about how you use your device. A couple of years back, I noticed this the hard way. After learning from my experiences, I made a variety of small changes to offset the battery drain issue, and my 2.5-year-old smartphone’s battery capacity has only gone down by 12 percent.