CSB Battery HR1221WF2 12V 5.3Ah AGM VRLA Rechargeable Battery with F2 Terminals

Critical systems demand a power source that won’t fail when you need it most. The CSB HR1221WF2 is a 12V 5.3Ah valve-regulated lead-acid (VRLA) battery engineered for reliable backup power in UPS units, emergency lighting, security systems, medical equipment, and telecommunications. Its absorbent glass mat (AGM) technology immobilizes the electrolyte, making the battery spill-proof, maintenance-free, and safe to operate in any orientation.

Who is it for

Facility managers, IT administrators, and security integrators who require a dependable, long-lasting battery for standby and cyclic applications. It is also suitable for medical device maintenance teams and telecom field technicians.

Main features

• 12V nominal voltage and 5.3Ah capacity at 20-hour rate
• 21W high-rate discharge capability for short backup times
• AGM VRLA construction – no free liquid, leak-proof, maintenance-free
• F2 Faston tab terminals (0.250 inch) for secure, quick connections
• 5-year design life under normal float service
• Wide operating temperature range: -15°C to 50°C for discharge
• Low self-discharge: less than 3% per month at 20°C
• ABS container material (UL94-HB) for durability

Specifications

• Nominal voltage: 12V
• Nominal capacity (20-hr rate): 5.3 Ah
• Nominal capacity (15-min rate): 21W
• Battery technology: VRLA (AGM)
• Terminal type: F2 (Faston Tab 250)
• Design life: 5 years
• Internal resistance: approx. 19 mΩ
• Max discharge current (5 sec): 79.5 A
• Max charge current: 1.59 A
• Float charge voltage: 13.5 to 13.8 VDC/unit at 25°C
• Cycle use voltage: 14.4 to 15.0 VDC/unit at 25°C
• Operating temperature (discharge): -15°C to 50°C
• Container material: ABS (UL94-HB)
• Self-discharge rate: less than 3% per month at 20°C

Tips

For maximum service life, keep the battery charged and avoid deep discharges. Store in a cool, dry place and recharge every 6 months if not in use. Always use a compatible charger with the correct voltage settings.