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Hi, Scooter model RE: Puma 9000 XR 1. Is it possible to upgrade an electric scooter battery to a larger battery? 2. If so, what is the maximum size I can increase to? 3. If I increase the battery, do I need to change something, for example: increase the position of the battery? 4. Can I change (with a qualified engineer of course) the controller at a speed of 140 km/h (1400 rpm)? 5. Can I program (with a qualified engineer of course), the electric braking system for 100A? 6. If so, it shouldn't affect the warranty as long as it's done professionally by an engineer, right? I would appreciate it if you could send me a reference to change the size of the battery location which must be increased following section 3. Please, send me a response to the email: sincerely, Benyamin Davodian