A similar battery originally appearance. However, to use it proves very disappointing. Count over 8 hours to fully charge, and you will see it to discharge completely overnight. Conclusion: no alarm clock in the morning, you arrive in a rush to work, and you let it charge all day ... So you can use your phone in total independence Edf network between your work and your departure time your bedtime. If you use your mobile phone as an alarm clock, I recommend adding a true revival for more security.