APC RBC18 Replacement Battery Cartridge #18 is backordered and will ship as soon as it is back in stock.
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Product Overview
The APC RBC18 is a genuine replacement battery cartridge for APC Smart-UPS systems, restoring runtime to original specifications. This APC UPS replacement battery uses a 6V 9Ah lead-acid cell tested and certified for compatibility with supported Smart-UPS models. Specifying the correct RBC cartridge keeps AV and IT power protection performing as designed once the original battery reaches end of life. It is the recommended path to recover backup runtime without replacing the entire UPS.
Product Description

The RBC18 ships as a brand-new battery from a strictly managed warehouse, helping ensure the cell arrives with healthy capacity. Each cartridge uses a 6V 9Ah lead-acid battery built to match the electrical and physical requirements of supported APC Smart-UPS units. Because APC RBC cartridges are tested and certified for compatibility, they restore UPS performance to the original specifications rather than approximating it with a generic cell. The cartridge carries a 2-year warranty and UPS safety certifications for confidence in deployment. APC also supports authorized recycling for environmentally responsible disposal of the depleted cartridge. Replacing the battery on schedule is essential to maintaining reliable ride-through power for the AV and IT loads connected to the host UPS. Always confirm your specific Smart-UPS model number against APC compatibility data before ordering.
Key Features
- Genuine APC cartridge — Tested and certified for compatibility to restore Smart-UPS performance to original specifications.
- 6V 9Ah lead-acid cell — Sized to match supported APC Smart-UPS runtime requirements.
- Factory-fresh battery — Shipped brand new from a strictly managed warehouse for healthy delivered capacity.
- 2-year warranty — Backed by a 2-year warranty and UPS safety certifications.
- Recycling support — APC-authorized recycling enables responsible disposal of the depleted cartridge.
Technical Specifications
| Model | RBC18 |
| Battery Type | Lead-acid |
| Voltage | 6V |
| Capacity | 9Ah |
| Compatible Series | APC Smart-UPS |
| Warranty | 2-year |
Specifications sourced from Schneider Electric (APC) product data.
Browse more power protection options in the APC Power Protection & UPS collection at Creation Networks.
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