Origineel bericht door: James ,
New batteries have never been charged so you set the life of that battery with the first 3-4 complete charge/discharge cycles that every seller recommend to do. You should let the battery charge with the phone off for 10-12 hours for these cycles then you can use it as you want. It makes a big difference, that's why I think that the battery you have is acting like this. If after making it charge and discharge like this it keeps working bad you probably have a bad battery.