Yuasa Yucel 6V 4Ah SLA (Y4-6)

The Yuasa Yucel Y4-6 (6 V 4 Ah) SLA battery is a compact, sealed lead‑acid (SLA) rechargeable battery designed for reliable standby and cyclic power applications. Here’s a clear breakdown of its features, specifications, and typical uses:

 Key Specifications

• Voltage: 6 volts
• Capacity: 4 ampere-hours (Ah)
• Battery type: Sealed Lead Acid (VRLA – Valve Regulated Lead Acid)
• Technology: Absorbent Glass Mat (AGM)
• Maintenance: Maintenance‑free (no need to top up electrolyte)
• Terminals: Typically Faston spade terminals (varies slightly by version)

Design & Construction

• Sealed construction: Completely spill-proof and can be mounted in various orientations (except upside down)
• AGM technology: Electrolyte is absorbed in fiberglass mats, improving safety and vibration resistance
• Valve-regulated: Releases gas only in extreme conditions, helping maintain internal pressure
• Durability: Designed for both standby use (constant float charge) and cyclic use (repeated discharge/charge)

Typical Physical Characteristics

(Approximate; slight variation by batch/model revision)

• Length: ~70 mm
• Width: ~47 mm
• Height: ~101 mm
• Weight: ~0.7 kg

Performance Characteristics

• Float (standby) charging voltage: ~6.75–6.9 V
• Cycle charging voltage: ~7.2–7.5 V
• Operating temperature range:
  • Discharge: approx. -15°C to +50°C
  • Charge: approx. 0°C to +40°C
• Self-discharge rate: Low (can typically sit for months without significant charge loss)
• Service life:
  • ~3–5 years in standby applications (depending on conditions)

 Common Applications

The Y4‑6 is widely used in small devices requiring dependable backup or portable power, such as:

• Emergency lighting systems
• Alarm and security systems
• Small UPS units (uninterruptible power supplies)
• Portable electronics and hobby equipment
• Medical and diagnostic devices
• Electric toys and ride-ons

• Maintenance-free operation
• Leak-proof and safe to handle
• Reliable and cost-effective energy storage
• Good performance in intermittent and backup roles