The best alternatives to Battery Watcher are FIPLAB, Battery Indicator, and AlDente. If these 3 options don't work for you, we've listed a few more alternatives below.
What do you think of Battery Watcher?
Bebop.ai— Sales Teams, Stop Wasting Time on Cold Leads!
FIPLAB is an award winning application development studio in London that specialises in creating intrinsically viral, high quality iPhone, iPad, Mac and Windows 8 applications.
Greenify help you identify and put the misbehaving apps into hibernation when you are not actively using them, to stop them from lagging your device or leeching the battery, in a unique way! They can do nothing without explicit launch by you or other apps, while still preserving full functionality when running in foreground.