HR1221W 12V High-Rate VRLA-AGM Battery

Product Features

Valve-regulated lead-acid (VRLA) battery
Absorbent glass mat (AGM) technology, maintenance-free, with gas recombination efficiency up to 99%
Pure lead construction with proprietary elements
Designed for high-rate UPS and float standby power applications
Manufactured to IEC 61056-1/2:2012 and UL1989 certified (MH14533)

Application Scenarios

Uninterruptible power systems for server racks
Backup power for small and medium data centers
UPS backup solutions for medical imaging equipment
Emergency power protection for network equipment rooms
Backup power for precision laboratory instruments
Fast-discharge UPS applications in industrial control

Product parameters

Model：HR1221W
Voltage：12 Vdc
Nominal Capacity：21W @15min-rate
Watts per Cell：52.5 (5-Min 1.67 VPC @ 25°)
Watts per Cell：25.0 (15-Min 1.67 VPC @ 25°)
Max. Charge Current：2.10 A
Max. Discharge Current：90 A
Short Circuit Current：249 A
Internal Resistance：23.0 mΩ
Terminal Type：F2 terminal (Faston Tab 250)
Container Material：ABS (UL 94-HB) standard, flame-retardant (94-V0) available upon request
Weight：1.80 / 3.97 kg / lb.
Length (L)：90.0±1.0 / 3.54±0.04 mm / in
Width (W)：70.0±1.0 / 2.76±0.04 mm / in
Height (H)：106.1±1.5 / 4.18±0.06 mm / in
Design Life：Up to 5 years in standby service at 25°C; Eurobat (20°C): 3-5 years, Standard Commercial
Float Charging Voltage：13.5 - 13.8 Vdc/battery
Equalizing Charging Voltage：14.4 - 15.0 Vdc/battery
Operating Temperature：discharge -15°C to 50°C; charge/storage -15°C to 40°C
Note：F1 terminal is available; Max Discharge Current = 60 A

Product details

The CSB HR1221W belongs to the HR series of high-rate discharge pure lead batteries. It is a 12V valve-regulated sealed lead-acid battery featuring AGM technology with a pure lead construction, officially positioned for smaller-output UPS and fast-discharge backup power scenarios. Nominal capacity is expressed as 21W at the 15-minute rate at 25°C and 1.67 VPC, with 52.5 W/cell at the 5-minute rate and 25.0 W/cell at the 15-minute rate, making it suitable for float standby applications requiring short-duration high-power output. In terms of electrical specifications, float charge voltage is 13.5 to 13.8 Vdc/battery (25°C), and equalize charge voltage is 14.4 to 15.0 Vdc/battery (25°C); maximum charge current is 2.10 A, maximum discharge current is 90 A, short-circuit current is 249 A, and internal resistance is 23.0 mΩ. The battery's nominal operating temperature is 25°C, discharge temperature range is -15°C to 50°C, and charge and storage temperature range is -15°C to 40°C. In terms of self-discharge performance, remaining capacity after 90 days of storage at 25°C is still above 90%, and it can be stored for up to 6 months; it must be fully charged before use, and if storage temperature exceeds 25°C, it should be charged earlier. Terminal type is F2-Faston Tab250, and the case material is ABS (UL 94-HB), with a flame-retardant (94-V0) version available upon request. Dimensions are 90.0±1.0 mm in length, 70.0±1.0 mm in width, and 106.1±1.5 mm in height, with a weight of approximately 1.80 kg (3.97 lb). Design life reaches up to 5 years under 25°C float conditions, and 3 to 5 years at 20°C under the Eurobat standard. This battery features a valve-regulated sealed lead-acid design and is maintenance-free. AGM technology provides up to 99% gas recombination efficiency, making it suitable for high-rate UPS and float standby power applications. The product is manufactured in accordance with IEC 61056-1/2:2012 and is recognized under UL1989 (MH14533). Its official application area is data center UPS, providing short-duration high-power backup support for data center uninterruptible power systems.