Hello 3 years ago I received a scooter Flex Tech Fun 50 cm3 for my birthday. Use the scooter rarely, have driven 2000 km to today. Have already the 3 battery and this is now broken. About the kickstarter it sometimes goes on the first time but also after the 30 times :-(. What can this be about? Would a lithium-ion battery be better? What would you make apart from buying a new scooter? LG Melanie