Newstar HR1221W 12V High-Rate UPS Battery (21W/Cell, AGM VRLA)

The Newstar HR1221W (12V, 21 Watts/Cell) is a high-rate valve-regulated lead-acid (VRLA) battery engineered specifically for UPS backup and standby power applications. Using AGM (Absorbent Glass Mat) technology, it provides fast discharge capability, stable output, and maintenance-free operation. Its compact size and reliable float performance make it ideal for small to medium UPS systems, fire alarm panels, security systems, and critical backup installations where dependable short-duration power is required.

Technical Specifications

• Brand: Newstar

• Model: HR1221W

• Battery Type: Valve Regulated Lead Acid (VRLA)

• Technology: AGM

• Nominal Voltage: 12V (6 cells per unit)

• Rated Capacity:

  • 21 Watts/Cell @ 1.67V (15-minute rate)

  • 5Ah @ 20-hour rate (10.5V)

• Internal Resistance: Approx. 27mΩ (fully charged at 25°C)

• Maximum Charging Current: 1.68A

• Maximum Discharge Current: 75A (5 seconds)

• Design Life: 5 years (float use @ 25°C)

• Eurobat Classification: 3–5 years (standard commercial)

Physical Dimensions

• Length: 90 ±1 mm

• Width: 70 ±1 mm

• Height: 101 ±1 mm

• Total Height: 107 ±1 mm

• Approx. Weight: 1.62 kg ±4%

• Terminal Type: T1 / T2

Charging Information

• Float Charging Voltage (25°C): 13.60 – 13.80V

• Cyclic Charging Voltage (25°C): 14.50 – 15.00V

• Temperature Compensation:

  • Float: −18 mV/°C/Block

  • Cycle: −30 mV/°C/Block

Operating Conditions

• Discharge Temperature Range: −15°C to 50°C

• Charge Temperature Range: −10°C to 50°C

• Storage Temperature Range: −20°C to 50°C

• Capacity Retention (10HR rate):

  • 40°C: 102%

  • 25°C: 100%

  • 0°C: 85%

  • −15°C: 65%

• Self-Discharge at 25°C:

  • 3 months: 91%

  • 6 months: 82%

  • 12 months: 65%

Warranty & Usage Disclaimer

Warranty:
This battery includes a 1-year warranty when used exclusively for UPS backup applications under normal operating conditions.

Important Usage Notice:
This battery is ONLY for UPS backup use.
Use in cars, generators, wheelchairs, golf carts, e-bikes, solar systems, or for engine starting will void the warranty. No warranty claims will be accepted for non-UPS usage.

Applications

✅ Suitable For

• UPS systems (primary use)

• IT & networking backup

• Fire alarm panels

• Security & access control systems

• Emergency power equipment

❌ NOT Suitable For

• Cars or automotive starting

• Generators or engine starting

• Wheelchairs or mobility devices

• Golf carts

• Electric bikes (e-bikes)

• Solar or deep-cycle applications