Yuasa 6V 5.5Ah Motorcycle Battery YUAM2655B (6N5.5-1D) — Dry‑Charged, Vibration‑Resistant Polypropylene Case

The Yuasa YUAM2655B (6N5.5-1D) is a compact 6V, 5.5Ah dry-charged motorcycle battery engineered for stronger cranking performance and long-term corrosion resistance.

If you need a small, dependable battery for vintage bikes, scooters, or compact engines, this Yuasa unit is built to deliver higher starting power while resisting vibration and acid damage. Yuasa increased plate density with special thin separators so each cell can hold two extra plates, boosting cranking output without significantly enlarging the battery footprint. The polypropylene case, poly-seal terminals, and dry-charged design make it a practical choice for seasonal storage and easy initial installation (battery acid sold separately).

How does this battery improve starting power?

The YUAM2655B achieves higher cranking performance by fitting additional plates into each cell using ultra-thin separators, which raises the active material surface area. That added plate count translates into stronger bursts of electrical current during engine start, particularly helpful for small-displacement engines or older starters.

• Two extra plates per cell increase active surface area for better cranking
• 6V, 5.5Ah capacity tuned for compact motorcycle electrical systems
• Dry-charged plates retain 70–80% charge when first filled, aiding immediate startability

Will this battery handle vibration and outdoor conditions?

Yes — the battery is designed with durability in mind. The polypropylene case and cover resist gasoline and oil exposure and tolerate wide temperature swings, while the internal construction minimizes wear from vibration so it remains reliable under on-road conditions.

• Durable polypropylene case and cover resist chemicals and weather
• Robust internal mounting reduces plate movement from vibration
• Poly-seal terminal design prevents acid seepage and reduces corrosion risk

What does "dry-charged" mean and what are the installation steps?

Dry-charged means the plates are shipped without electrolyte; the battery arrives dry to simplify storage and transport. To use it you fill the battery with the supplied acid (not included with this listing), allow it to reach the proper charge state, and then install it following the vehicle maker’s polarity and torque specifications.

• Battery shipped without acid for safe storage and transport
• After filling with acid, plates retain 70–80% charge initially
• Follow manufacturer instructions for filling time, standing period, and final charging

How does the terminal sealing extend battery life?

The YUAM2655B uses a poly-seal terminal system that prevents acid seepage at the terminal interface. By keeping corrosive electrolyte away from terminal hardware and surrounding components, the seals help reduce corrosion-related failures and maintain cleaner electrical connections over time.

• Poly-seal prevents electrolyte from wicking out and corroding terminals
• Cleaner terminals help maintain consistent electrical contact
• Less seepage reduces maintenance and extends usable service life

Who is this for? The Yuasa YUAM2655B is aimed at owners of small motorcycles, vintage bikes, scooters, minibikes, and garden machines that require a compact 6V power source with enhanced cranking ability and resistance to chemical and vibrational wear. Choose this battery if you want a dry-charged unit that’s easy to store until installation, offers improved starting performance through higher plate density, and includes design features targeted at reducing corrosion and mechanical stress. Note: battery acid is not included — follow all safety and manufacturer instructions when filling and installing the battery.