Samsung Galaxy Duos 3 Replacement Battery, which features a capacity of around 1500mAh. A spare or replacement battery for your galaxy identical to the original. This battery has been designed specifically for your handset and is ideal as a second battery or replacement for your original battery. Simply charge one while the other is in use and you'll be able to use your smartphone all day every day! This product provides outstanding talk and standby times. These batteries deliver the long-lasting and reliable performance you deserve. So you need not be worried that the new battery would damage your expensive phone in anyway. These batteries deliver the long-lasting and reliable performance you deserve. Standby Time 2-5 days.