Motorcycle batteries must endure vibration, frequent cold starts, and increasingly the demands of start-stop ignition systems, all within a compact form factor. The Bosch S5A AGM FA120 is engineered to meet those conditions, delivering 12V, 18Ah capacity and 250 CCA (EN) in an absorbed glass mat construction that resists the deep discharge cycles common to modern motorcycles, scooters, and off-road machinery.
Bosch manufactures the S5A range using AGM technology in which the electrolyte is suspended within a glass mat separator, eliminating free acid and enabling the battery to function in any orientation. The sealed, factory-activated construction means the unit leaves the European production facility filled, charged, and ready for immediate fitment no acid filling or pre-charging is required on arrival.
The FA120 measures 186 mm 82 mm 171 mm (L W H inclusive of terminals) and weighs 5.55 kg. Polarity should be confirmed against the product label prior to fitment. Cross-reference codes for this unit include 51814, 51913, YT19BL-BS, and YT19BL. Where start-stop compatibility is required, verify suitability via the product label." The Bosch S5A AGM range spans multiple capacities and footprints. Related variants available on site include FA100 through FA109; similar AGM alternatives include AGM12-16 and AGM12-18. The FA120 is supplied with a 1-year warranty covering defects in materials and workmanship under normal operating conditions. "Standard delivery: 13 working days within UK mainland. 30-day returns.
Sealed factory activated battery: ready for use, filled with acid, fully charged in Europe Adapted to deep discharge and vibrations: as efficient for short distance trips with frequent starts as for motorsports and off-road applications Suitable for motorcycles (off-road and touring), enduros, scooters, quads, jet skis, snowmobiles and applications with many electrical consumers Installation angle: up to 30° thanks to AGM technology.
Key Feature:
- Backed by a 1 Year Warranty-year warranty for dependable service life and reliable performance under everyday driving conditions.
- Product Group: 2630, BOSCH MOTORCYCLE BATTERY, engineered to deliver consistent starting power and steady performance in demanding automotive applications.
- Engineered as a No 12.0 battery, ensuring consistent current flow, strong cranking power, and stable voltage delivery.
- Manufactured by Bosch, a German engineering leader delivering advanced technology and durable performance in modern vehicles. .
- Weighs 5.55 kg (12.2 lb), balancing high capacity with manageable handling for easy fitting and routine maintenance.
- OEM-style design ensures perfect terminal alignment, secure fitment, and support for both standard and start-stop vehicle systems.
Compatibility:
optimised for motorcycles and two-wheelers, ensuring consistent ignition power, rapid recharge capability, and stable energy supply for compact high-performance engines and accessory systems.
Uses:
- Restores dependable starting for vehicles that require consistent, everyday performance in regular driving conditions.
- Suited to No battery applications, delivering steady operation for vehicles with start-stop or accessory-heavy systems.
- Supports stable electrical output for ignition, lighting, infotainment, and critical onboard electronics in all environments.
- Performs reliably across short commutes and longer journeys where consistent restarts and electrical stability are essential.
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Fitment Warning:
You must check your current battery against the specifications of this battery before ordering to ensure that this is the correct battery for your vehicle. Check battery technology, dimensions, terminal type, polarity, capacity (AH) and cranking performance (CCA). We cannot guarantee correct fitment under any circumstances.