HOW IT WORKS ★ Limit Fully Charging Your Device. ★ Non-Intrusive as possible! ★ Reminder when battery is getting below 40% save you from emergencies created by battery losses. ★ if charged over 80% Stop Charging to Protect battery from overheat ,explosion , wear and tear ,extend battery life. The 40-80 rule. The battery performs its best when it is at this range. Other Features : ★ Low Impact to battery , App doesn't run instantly when Battery level changes . Saving battery life. ★ Turn of