Not as great as the zero lemon charge which holds for up to 3-4 days on continuous use but that one is very bulky so not very satisfactory in that regard - this charger is smaller/sleek and holds a charge certainly longer than the standard battery but my first day of use I listened to music for several hours and made multiple calls on it and the battery was dead by 7pm same night on full charge. For the balance and cost I'd say worth it.