Battery up to scratch

I've gained this Samsung S5150 me recently. Need my phone mainly write for calling and texting. A good camera is also important to me. Mobile I really like, is comfortable to hold, easy to use and disappears inconspicuously in your pocket. However, I am very disappointed by the battery. After max. 3 days, the battery during normal operation with 1-2 mostly short calls per day empty, although werden.Das touted to 400 hours in standby and 7 hours of operation is annoying, so I also only 3 stars. The phone itself would have earned more.