I have been doing battle with the battery vampires, apparently similar to a lot of people on here. I have a Samsung Droid Charge (SCH-i510), and service with Verizon.
I have noticed my battery life growing shorter and shorter.
As I've had the phone for at least a couple of years now, my very first step in the solution was a new battery. No difference. Even with a brand-new battery, my charge would last less than 24 hours. So, I began my research. Discovered all the settings to correct, and changed them, (wifi, GPS, 4G, etc.). Still, my phone charge would barely last from when I unplugged it in the morning until I plugged it in to charge overnight. I dove deeper into the phone settings. This weekend, I noticed that my phone battery lasted all weekend. ALL WEEKEND ON A SINGLE CHARGE.
As I live in a rural area, my service is a bit spotty. This got me thinking. I started reading all the permissions that the apps on my phone call for, looking for one that would cause increased battery drainage while in urban areas (around more cell phones, towers and wifi hot spots.) I found one such ambiguous app: "Bluetooth Test". This app is a "default app" and is automatically granted permission to MODIFY BATTERY STATISTICS, (apparently to hide its tracks from the user,) as well as pretty much permission to do whatever it wants, right up to internet access. Apps granted such permissions pretty much makes the Battery Usage page irrelevant, as any app can reassign its battery usage to "Display". As of yet, I've found no mention of it on this site. Does anybody have any info on this app?