General Specifications

• Model: HR1221WF2
• Type: Valve Regulated Lead Acid (VRLA), Maintenance-Free
• Technology: AGM (Absorbent Glass Mat) for efficient gas recombination (up to 99%)
• Nominal Voltage: 12V
• Capacity: 21 Watts per cell at 15-minute rate to 1.67V/cell at 25°C
• Weight: Approx. 1.80 kg (3.97 lbs)

 Electrical Characteristics

• Max Discharge Current: 60A/90A for 5 seconds
• Short Circuit Current: Approx. 249A
• Internal Resistance: Approx. 23 m
• Max Charge Current: 2.1A
• Float Charging Voltage: 13.5–13.8 VDC/unit at 25°C
• Equalization Charging Voltage: 14.4–15.0 VDC/unit at 25°C

 Physical Dimensions

 Design & Durability

• Cycle Life: Over 260 cycles at 100% discharge
• Standby Life: Up to 5 years at 25°C
• Terminal Type: Faston Tab 187/250 (F1/F2)
• Container Material: ABS (UL 94-HB); Flame Retardant (UL 94-V0) available on request

 Temperature Ranges

• Discharge: –15°C to 50°C
• Charge: –15°C to 40°C
• Storage: –15°C to 40°C
• Nominal Operating Temp: 25°C (77°F)