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CSB HR1221W 12V 5Ah F2 Terminal High Rate Battery
CSB HR1221W F2 Battery - 12V Compact High Rate VRLA
Warranty
Small Case, High-Rate Plates
- Sealed VRLA-AGM - maintenance-free recombination design, mountable in the orientation the enclosure dictates.
- IEC 61056-1/2:2012, UL1973 Listed, UL1989 Recognized - the same certification set as the rest of the HR line.
- Float service ready - 13.5 to 13.8 volts per battery at 77°F, matched to small-UPS charger profiles.
Technical Specifications
| CSB HR1221W F2 Specifications | |
|---|---|
| Part Number | HR1221W F2 (also searched as HR1221WF2, HR 1221W, CSB HR1221W) |
| Battery Type | VRLA-AGM, high rate, top terminal |
| Nominal Voltage | 12V |
| Power Rating, 15-minute | 25.0 watts per cell to 1.67 VPC at 77°F (150 W per battery) |
| Power Rating, 5-minute | 52.5 watts per cell to 1.67 VPC |
| Max Discharge Current | 90 A (F2 build; the F1 build is rated 60 A) |
| Short Circuit Current | 249 A |
| Internal Resistance | Approx. 23.0 milliohms |
| Terminal Type | F2 Faston tab, 0.250 inch |
| Length | 3.54 inches (90.0 mm) |
| Width | 2.76 inches (70.0 mm) |
| Height | 4.18 inches (106.1 mm) |
| Weight | 3.97 lbs (1.80 kg) |
| Container | ABS (UL 94-HB); flame-retardant 94-V0 build available on request |
| Operating Temperature | Discharge -15°C to +50°C; charge and storage -15°C to +40°C |
| Float Charging Voltage | 13.5 to 13.8 Vdc per battery at 77°F |
| Design Life | Up to 5 years standby at 77°F (CSB) |
| Warranty | 1 year (CSB) |
| Country of Origin | Vietnam |
Where This Battery Is Used
- Compact desktop UPS units - the small line-interactive models under desks and behind registers.
- Rack UPS trays built on the small brick - some multi-battery designs use this case in quantity.
- Instrument and device backup - short-duration power holds where the enclosure decides the battery.
Ordering and Shipping
Frequently Asked Questions
HR1221W or HR1227W for the same tray?
They share the exact case, 3.54 by 2.76 by 4.18 inches, so either fits where the other does. The HR1227W carries 27.0 watts per cell against this battery's 25.0, with a higher maximum discharge current, for a few ounces more lead. If the tray was built around one model, replace like for like; if you are specifying fresh and the charger supports it, the 1227W's headroom is usually worth having.
What is the F1 terminal option?
The same battery with the narrower 0.187-inch Faston tab, rated 60 A maximum discharge against the F2 build's 90 A. The tabs are not interchangeable without an adapter, and adapters add a joint where you least want one. Match the tab to your connector: check the battery coming out, or send a photo with the quote request.
How should spare units be stored?
Cool and charged. CSB rates self-discharge under 10% over the first 90 days at 77°F, with storage up to 6 months before a recharge is required, and sooner if the shelf runs warm. A spare that sat for a year without charge is not the spare you think it is, so date the box and put a recharge on the calendar.
Send the quantity, your delivery ZIP and your requested-by date. A specialist confirms the terminal build, availability, the warranty term and shipping in writing, with no obligation to buy.
Call 1-877-775-4381 · battery specialists, not a call centerWARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov (State of California only).
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