Can the battery capacity be monitored without a universal meter? MeritSun Bluetooth battery can do ！

MeritSun LiFePO4 battery features: 1) MeritSun battery is just 1/2 weight and much compact size than lead acid battery. 2) MeritSun battery work 100% DOD cycles life more than 4000 times, which is 10 times more than a lead acid battery, that drive me far and enjoy round trip journey. 4) MeritSun battery warranty three years, which its service life 20 years. 5) And the cool kits is that MeritSun battery come with Bluetooth APP, which make checking battery power status easy and fun, and save me if I’am on the half way at the water.