FA 128 Bosch AGM Motorcycle Battery 12V 9Ah - 0986FA 1280, 1 Year Warranty

Motorcycle batteries must endure high-vibration environments, frequent short-run discharge cycles, and the demands of modern start-stop ignition systems conditions that degrade conventional flooded cells rapidly. The Bosch S5A AGM (FA128) is engineered specifically to meet these requirements, offering a sealed, maintenance-free solution for riders who need dependable starting power without compromise.

Manufactured in Europe, the S5A range uses Absorbent Glass Mat technology, in which the electrolyte is suspended within a fibreglass mat rather than pooled freely in the case. This construction eliminates acid stratification, improves resistance to mechanical shock and vibration, and enables the battery to recover reliably from the partial states of charge common to short-distance urban riding and motorsport applications. The battery is factory-activated filled with acid, fully charged, and sealed before despatch ensuring it is ready for immediate fitment without any pre-conditioning.

The FA128 operates at 12 volts with a rated capacity of 9Ah (C20) and a cold cranking amperage of 100A (EN). Physical dimensions are 135mm 75mm 139mm (L W H) and the battery weighs 3.05 kg. Polarity configuration should be verified against the product label prior to installation. Cross-reference codes include YB9L-A2, YB9L-B, and 12N9-3B. The Bosch part number is 0986FA1280.

The FA128 is one of ten variants in this Bosch S5A AGM listing. Related SKUs within the range include FA100 through FA109, covering a spectrum of capacities and dimensions to suit different motorcycle platforms. Compatible alternatives from other brands are also available on site under ET12A-BS, ET12B-BS, ET9B-BS, ETX12-BS, and ETX9-BS.

This battery is supplied with a 1-year warranty, providing cover against manufacturing defects 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.

• 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 3.05 kg (6.7 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.

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.

• 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.

PartsForMachines is a premier e-commerce platform, founded in 2019 in Warwickshire, UK, specialising in aftermarket parts and services for construction, agriculture, and industrial machinery. We offer an extensive catalogue of over 500,000 products. Standard delivery: 1–3 working days within UK mainland. We are proud to be an authorised distributor, giving customers extra confidence when purchasing genuine products from us. In addition, we provide a 30-day return policy for eligible items.

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.