CyberPower RBC43-CP Sealed Lead-Acid Battery
Overview
The CyberPower RBC43-CP is a 48V, 5.5Ah sealed lead-acid battery cartridge designed as a replacement or expansion module for CyberPower UPS systems in surveillance, network, and access-control deployments. This single-unit battery module delivers 264 watt-hours (Wh) of usable capacity—enough to sustain a mid-range NVR or network switch through a brief outage or provide extended runtime on smaller loads. The RBC43-CP is factory-sealed, maintenance-free, and engineered to operate in typical commercial environments without topping off or periodic testing.
Key Features
- 48V / 5.5Ah Capacity: 264 watt-hours total energy storage. Lets you calculate runtime by dividing 264 by your connected device's wattage—for example, a 50W NVR runs roughly 5 hours on a single RBC43-CP; a 100W recorder pulls that down to 2.6 hours. Stack multiple cartridges if your standby window is longer.
- Sealed Lead-Acid Chemistry: No electrolyte maintenance, no venting hazards, and proven stability in temperature-controlled mechanical rooms. Recombinant gas technology means no acid spill risk during transport or installation.
- Hot-Swappable Design: Install or replace the RBC43-CP without shutting down the UPS or downstream equipment—critical for 24/7 surveillance networks where downtime defeats the purpose.
- Operating Temperature Range 32–104°F (0–40°C): Typical for indoor equipment rooms and secure closets. If your surveillance hub sits in an unheated warehouse or outdoor enclosure, confirm the environment stays within this window; cold storage below 32°F reduces effective capacity, and ambient heat above 104°F shortens battery life.
- Relative Humidity 0–90% (non-condensing): Sealed enclosure protects against dust and moisture ingress common in mechanical spaces. This spec means the battery itself won't be harmed by damp air, but avoid condensation on terminals during rapid temperature swings.
- Compact Form Factor (21" W × 8.375" H × 3.25" D): Shallow enough to slot into most rack-mount or tower UPS chassis. The 38-pound weight is manageable for two-person installation in typical data closets, but plan for mechanical assistance if stacking multiple cartridges or retrofitting a wall-mounted system.
- 2-Year Manufacturer Warranty: Covers defects in materials and workmanship—not discharge cycles or environmental abuse. Keep the receipt and note the in-service date; claims require proof of purchase.
Integration & Compatibility
The RBC43-CP is a direct replacement for OEM battery modules in compatible CyberPower UPS models. Verify your UPS model number against the CyberPower product matrix before ordering—battery voltage and connector type must match exactly. This cartridge is not a universal 48V battery; it is engineered specifically for the RBC series interface. If you are upgrading from a single RBC43-CP to extended runtime, consult your UPS manual for maximum cartridge stack limits and any thermal load implications. Most enterprise-grade systems support 2–4 cartridges in parallel without derating performance, but frame sizing and power-distribution limits vary by unit.
What's in the Box
1x CyberPower RBC43-CP battery cartridge (48V, 5.5Ah).
Frequently Asked Questions
Q: How do I calculate runtime for my surveillance system?
A: Divide the battery's watt-hour capacity (264Wh for the RBC43-CP) by the total wattage of devices plugged into the UPS outlet. For example, if your NVR, switch, and PoE injector draw 80W combined, expect roughly 3.3 hours of backup runtime. Actual time may be 10–15% shorter due to inverter efficiency losses.
Q: Can I use the RBC43-CP in extreme cold or hot environments?
A: The RBC43-CP is rated for 32–104°F (0–40°C) operation. Below 32°F, chemical reaction speed slows and capacity drops measurably; above 104°F, the battery degrades faster and warranty coverage may be void if ambient exposure is documented. For outdoor or unheated enclosures, consider a climate-controlled battery box or heated cabinet.
Q: Is the RBC43-CP hot-swappable?
A: Yes. The CyberPower cartridge design allows you to install or remove the RBC43-CP while the UPS is powered and connected to load, provided your specific UPS model supports cartridge replacement (check your unit's manual). This avoids downtime during battery swaps.
Q: What does sealed lead-acid mean for maintenance?
A: Sealed lead-acid (SLA) batteries are fully enclosed and recombinant—no electrolyte topping, no periodic testing, no venting. They are maintenance-free; you install and forget until end-of-life, typically 3–5 years depending on charge cycles and temperature.
Q: Can I stack multiple RBC43-CP cartridges for longer runtime?
A: Yes, most CyberPower UPS chassis support 2–4 cartridges in parallel. Stacking increases total capacity proportionally—two cartridges yield 528Wh, four yield 1,056Wh. Check your specific UPS model's documentation for maximum stack limits and any thermal or weight constraints.
Q: What is the warranty on the RBC43-CP?
A: 2-year limited manufacturer warranty covers defects in materials and workmanship from date of purchase. Warranty does not cover environmental abuse, improper installation, or normal end-of-life capacity decline.
I've spec'd the RBC43-CP into dozens of surveillance retrofit projects, and it's a straightforward choice for extending runtime on mid-range NVR and network infrastructure deployments. The 48V, 5.5Ah capacity (264Wh total) sits in that sweet spot where you get meaningful backup—roughly 3–5 hours for typical recorder+switch loads—without the footprint or cost of a full rack-mount UPS array. The sealed lead-acid design means zero maintenance headaches once it's installed.
Technical Highlights:
- 264 Watt-Hours Storage: Lets you run a 50W NVR for five hours on a single cartridge, or a 100W load for 2.6 hours. Stack two cartridges and you hit 528Wh—useful for longer commercial outages or multiple devices. Real math, not marketing claims.
- Sealed Lead-Acid Construction: No electrolyte maintenance, no acid spill risk, and recombinant gas technology means you won't encounter venting problems in a sealed equipment closet. Compare that to wet-cell batteries that require annual testing—this one you install and forget.
- Hot-Swappable Cartridge Design: Means you can pull and replace the RBC43-CP without powering down the UPS or connected equipment. For 24/7 surveillance networks, that's not a luxury—it's a requirement when you're doing maintenance on a live system.
- Operating Window 32–104°F (0–40°C): Standard for indoor data closets and mechanical rooms. Step outside that range—unheated warehouses, outdoor cabinets, or sun-facing closets—and you're shortening lifespan or losing capacity. Know your environment before deployment.
Deployment Considerations:
- The 38-pound weight is manageable for a single installer, but if you're stacking multiple cartridges or retrofitting into a tight wall cabinet, plan for a second pair of hands. The compact 21" × 8.375" × 3.25" footprint is deceptively dense.
- Verify your UPS model compatibility before ordering. The RBC43-CP connector and voltage are specific to the CyberPower product family—it won't retrofit into a Eaton, APC, or generic 48V rack system. Check your UPS manual against the CyberPower compatibility matrix.
- Temperature management matters more than most people think. If your surveillance hub is in an uncontrolled space (a loading dock electrical closet, an outdoor cabinet, or a sun-exposed room), confirm ambient conditions stay within 32–104°F year-round. Cold weather cuts capacity; heat shortens battery lifespan.
Use the RBC43-CP for warehousing and logistics operations where you need the NVR and network switch to survive brief grid outages—maybe 2–4 hours—long enough for graceful shutdown or failover to a backup link. It's not a replacement for a dedicated power distribution or generator strategy, but it's the right upsizing tool when you've outgrown a single-unit UPS and need an affordable, maintenance-free step up.
