Your Smart-UPS X has the brains. This cable gives it more legs. The SMX039-2 is a 48V battery extension cable for the APC Smart-UPS X range, connecting additional external battery packs so your backup window stretches well past the internal cells. When a 20-minute blackout turns into an afternoon, this is what keeps your critical load alive until the substation comes back
| brand | APC |
| model | SMX039-2 |
| product_type | Battery extension cable |
| voltage | 48V |
| compatible_range | APC Smart-UPS X |
