A high-performance battery of 1350 mAh that extends the usage time of your Galaxy Ace S5839i/Hugo Boss/S5839/S5830. Replace your old battery, and your smartphone will function like it did on the first day. The battery is manufactured to the highest quality standards. Features and product specifications: Samsung Galaxy Ace S5839i replacement battery – replaces EB494358VU. 1350 mAh high-performance battery - guarantees the same performance as the original battery. Overvoltage and heat protection for safe charging. Complies with European regulations regarding safety and user protection.