Panasonic Battery Worn out After 9 Years

Coming from the supermarket with two bags full of groceries, I started my return trip home as usual: Battery check. Full, no worries, off we go. After about 300 meters hill up on the slope, the power indicator flickered and went from nearly full capacity to zero. Luckily, I managed to reach my house without a total power stop. Immediately,I ordered a new batteryr,the first one after 9 years! I paid 369 Euro for a brand new original Panasonic 16 ah power pack. At this very moment, the postman has delivered it.