Description
HC1221W Battery Replacement (12V High-Rate VRLA/AGM)
If your UPS is beeping, failing self-tests, or no longer holding runtime, it may be time to replace the internal battery. This HC1221W battery replacement is a 12-volt high-rate sealed lead acid (VRLA/AGM) battery type commonly used in UPS battery backups (including select models from APC and Belkin) and other standby power equipment. CSB no longers makes it so we have our replacement.
What is HC1221W Battery Replacement?
“HC1221W” is widely referenced as a high-rate UPS/standby battery class. CSB no longers makes it so we have our replacement. In manufacturer datasheets for this family, the battery is specified as 12V with a high-rate capacity rating (commonly shown as 21W at a 15-minute rate at 25°C), designed for efficient discharge in backup situations.
Common uses / applications
- UPS battery backups (commonly referenced for select APC and Belkin UPS models)
- Standby/backup power systems where a compact 12V high-rate AGM battery is required
- Some sellers also list emergency lighting and alarm/standby equipment as common categories for this size/class—always verify your device requirements
How to confirm compatibility (important)
Because “HC1221W” can appear across multiple brands/listings, confirm these before ordering:
- Voltage: must be 12V.
- Terminal style: recessed/FP or Faston tabs can vary by device and listing—match what you have now.
- Dimensions: compare your existing battery measurements. Some compatible listings show approx. 5.5 × 1.89 × 4.02 in (L×W×H).
- UPS/equipment model: send us the model number and we’ll help verify.
Replacement tips
- Power down and unplug your UPS/equipment before replacing the battery.
- Replace batteries as a set when your UPS uses more than one battery for best performance.
- Recycle your old sealed lead battery properly (most local battery retailers accept SLA/VRLA batteries).
Need quantity pricing or help matching?
Contact BatteryPlex with your device model + a photo of the battery label and terminals, and we’ll confirm the correct replacement.
HC1221W Battery Replacement 12 Volt
This 12V rechargeable sealed lead acid battery is a compatible replacement for the CSB HC1221W batteries.
The voltage, capacity, and physical dimensions of this high quality battery are nearly identical to the CSB HC1221W battery.
Our replacement battery is for the following models:
- HC1221W
- BP4.5RT
- TLV1260A
- B00515
- SP12-5.5RT
| Nominal Voltage: | 12v |
| Nominal Capacity: | 5.5Ah 23watt |
| Chemistry: | Sealed Lead Acid |
| Weight (pounds): | 3.95 |
| Length x Width x Height (inches): | 5.5 x 1.89 x 4.02 |
| Terminals: | Recessed |
HC1221W Battery Replacement FAQ
What devices use an HC1221W battery?
HC1221W is commonly referenced for UPS battery backups, including select models from APC and Belkin. :contentReference[oaicite:10]{index=10}
Is HC1221W the same as HR1221W?
They’re often treated as the same 12V high-rate 21W/15-minute class in many marketplaces/datasheets. Always match your existing label/spec and physical fit. :contentReference[oaicite:11]{index=11}
What are the key specs I should match?
Match 12V, the terminal style, and the dimensions. Some compatible listings show approx. 5.5 × 1.89 × 4.02 in (L×W×H). :contentReference[oaicite:12]{index=12}
Why does my UPS show “replace battery” even though it powers on?
A UPS can still turn on with a weak battery, but it may fail self-tests or provide little to no runtime during an outage.
How long do these batteries typically last?
Standby batteries often last a few years depending on temperature, usage, and charging conditions. If your UPS is in a hot closet or attic, life is usually shorter.
Do I need to replace both batteries if my UPS has two?
Yes—replace as a set whenever possible so the batteries age and charge evenly.
APPLICATIONS / “USED IN”
– Commonly used in select APC and Belkin UPS battery backups (examples and category references appear across multiple battery suppliers and listings).
– Also commonly referenced for general UPS/standby power use in the HC/HR 12V 21W class.
Reviews
There are no reviews yet.