Roller battery 12 V 5 Ah maintenance-free as a reinforced battery suitable also for 12 V 4 Ah (YB4L-B) suitable for many scooters : Amazon.nl: Automotive
MF2923 - Battery Gel YB4L-B 4AH MALOSSI BOOSTER BWs F12 Aerox Nitro Zip NRG Sp | eBay
Accu NOVASCOOT YB4L-B 12V-4Ah SLA Sealed (gel/ zuur) - Accu s - EasyParts.nl - Scooter- en brommeronderdelen bestellen