What Is The 12-085-05-975AHL B Group Battery?

The 12-085-05-975AHL B Group Battery is a 12-volt sealed lead-acid power source designed for 1985 Yamaha PZ480E Phazer Deluxe snowmobiles. This maintenance-free, factory-activated unit delivers 12Ah capacity with spill-proof construction, requiring no acid refills. Its B-group designation ensures compatibility with specific cold-weather vehicle dimensions and terminal placements.

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What applications suit this battery type?

Optimized for vintage snowmobiles and small-engine vehicles, this power cell provides reliable cold-cranking performance. Its leak-resistant design prevents corrosion in vibration-intensive environments common to winter sports equipment.

Deep Dive: Developed for Yamaha’s 480cc two-stroke engines, this battery withstands temperatures from -30°C to 60°C. The 12Ah capacity supports 180-220 cold cranking amps (CCA), critical for subzero starts. Unlike conventional lead-acid units, its absorbed glass mat (AGM) technology maintains charge during seasonal storage. Pro Tip: Always verify terminal polarity alignment when replacing older batteries – reversed connections can fry voltage regulators. For example, the UB-YTX14AHL-BS equivalent delivers 10-15 start cycles per charge in -20°C conditions.

How does capacity affect snowmobile performance?

The 12Ah rating balances weight and output for 1980s-era snowmobiles. Modern upgrades typically require 20-30Ah, but original equipment specifications demand precise energy matching to avoid electrical system strain.

Deep Dive: Oversized batteries (15Ah+) may physically fit but create parasitic drain on 35-year-old alternators. The original 12Ah capacity aligns with the PZ480E’s 200W charging system output. Practical testing shows 8-10 minutes of continuous starter operation per full charge. Did you know? Substituting higher CCA ratings without stator upgrades accelerates brush wear. A real-world comparison: UpStart’s replacement provides 90% original OEM performance while eliminating acid maintenance hassles.

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