Battery for SLVR L9 mixed feelings

The SLVR L9 my battery had earlier held 5-7 days on average. After more than 2 years he held only 2-3 days before I had to recharge it. With the new battery, the phone holds a maximum of 2 days by now (and without I call, so pure standby). Since I can not completely rule out a defect of the phone, I forgive 3 points (also because the supply of the battery was extremely fast).