Battery capacity dropped

My battery has lost about 50% of its of its capacity overnight. I use my scooter to get to work, I ride from my home to my local train station, about 1.8 km. I used to get there with about 100-98%, now I only have 85-90%. I used to be able to drive to work 2-3 times (about 9 km round trip) and still have 20% left, but now I have to charge every day and only have 30% left when I get home. What's going on? My scooter now has about 1,000 km on the clock.

Has anyone The Same Problem, btw im on The newest available Firmware Edit: Not 1.11