CSB Pure Lead HR1221W 12V High Rate VRLA-AGM Battery

Product Features

VRLA (Valve Regulated Lead Acid) battery
Utilizes AGM (Absorbent Glass Mat) technology, maintenance-free, with gas recombination efficiency up to 99%
Pure lead construction with proprietary element formulation
Designed for high-rate UPS and float charge backup power applications
Manufactured to IEC 61056-1/2:2012 standards, UL1989 certified (MH14533)

Application Scenarios

UPS backup solutions for small and medium-sized data centers
Provides uninterruptible power for server racks
Emergency power support for network equipment rooms
UPS backup power for medical imaging equipment
Fast discharge requirements for UPS in industrial control applications
Backup power supply for precision laboratory instruments

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

Designed for smaller output UPS and fast discharge backup scenarios, CSB officially positions the HR1221W as a 12V high-rate discharge pure lead battery. It belongs to the HR series, built with AGM technology and pure lead construction, with an overall valve regulated sealed lead acid design. Nominal capacity is rated at 1.67 VPC, 25°C, 15-minute rate 21W; the 5-minute rate power reaches 52.5 W/cell, and the 15-minute rate power is 25.0 W/cell, making it suitable for float standby duty requiring high power output for short durations. From an electrical specifications perspective, at 25°C the float charge voltage is 13.5 to 13.8 Vdc/battery, equalization charge voltage is 14.4 to 15.0 Vdc/battery, 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. Operating temperature is nominally 25°C; discharge is permitted from -15°C to 50°C, while charging and storage are from -15°C to 40°C. In terms of self-discharge, after 90 days of storage at 25°C, capacity remains 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, charging should be advanced accordingly. The terminal uses F2-Faston Tab250, the case is ABS (UL 94-HB), and a flame retardant (94-V0) version is available upon request. Dimensions are length 90.0±1.0 mm, width 70.0±1.0 mm, height 106.1±1.5 mm, weighing approximately 1.80 kg (3.97 lb). Design life is 5 years under 25°C float charge conditions; under the Eurobat standard, 20°C corresponds to 3 to 5 years. The valve regulated sealed lead acid construction makes it maintenance-free, and AGM technology provides up to 99% gas recombination efficiency, meeting the needs of high-rate UPS and float standby power supplies. The product is manufactured according to IEC 61056-1/2:2012 and is UL1989 recognized (MH14533). The official application area is data center UPS, capable of providing short duration high power backup support for data center uninterruptible power supply systems.