YG4L-BS Nanogel Battery 12V | Genuine 50cc, Vespa ET2

Stop getting stranded with a dead battery. The Prima YG4L-BS Nano Gel Scooter Battery arrives pre-filled and pre-charged — pull it out of the box, connect the terminals, and ride. Unlike conventional acid batteries that require activation and a full charge cycle before first use, this sealed gel unit is ready to install the moment it arrives. The nano gel electrolyte is non-spillable, vibration-resistant, and delivers consistent cranking power even after extended storage.

Key Features

• Pre-filled and pre-charged — install and ride immediately
• Nano gel electrolyte — sealed, non-spillable, maintenance-free
• Multi-position mounting — any orientation except upside down
• 12V 4Ah | 50 CCA
• Direct replacement for YG4L-BS / YTX4L-BS applications

Specifications

• Voltage: 12V DC
• Capacity: 4Ah
• Cold Cranking Amps (CCA): 50
• Type: Nano gel, maintenance-free, sealed
• Length: 4.4"
• Width: 2.7"
• Height: 3.3"
• Part Number: 0900-1115

Compatibility

Compatible Engine Codes

Fits all 139QMB-based 50cc and 80cc engines, including:

If your engine code contains "QM" or "FM", this battery is compatible with your vehicle.

Cold Climate Tip: If you store your scooter over winter, we highly recommend using a NOCO Smart Battery Charger to maintain charge and extend battery life through the off-season.

California Prop 65 Warning: www.p65warnings.ca.gov

• Pre-filled and pre-charged - install and ride immediately
• Nano gel electrolyte - sealed, non-spillable, maintenance-free
• Multi-position mounting (any orientation except upside down)
• 12V 4Ah | 50 CCA
• Direct replacement for YG4L-BS / YTX4L-BS

Voltage: 12V | Capacity: 4Ah | CCA: 50 | Type: Nano Gel Sealed | L: 4.4" | W: 2.7" | H: 3.3" | Part #: 0900-1115

Vespa ET2; Genuine Buddy 50, RoughHouse 50; all 139QMB/GY6 50cc-80cc horizontal engine scooters