- VoIP & Phone Systems
VoIP Number Porting: How to Keep Your Business Phone Numbers
18 Mar, 2026

£131.84 inc. VAT
AI-generated summary
If you already own an APC Smart-UPS X and you’re trying to extend the runtime with an extra battery pack, this extension cable is one of those “don’t improvise” purchases. The upside is simple: it’s designed for the Smart-UPS X battery pack setup, so you avoid compatibility headaches and the faff of returns. At ~£109 ex‑VAT, it’s not cheap, but for businesses the real value is reliability—getting the UPS to behave correctly under load beats saving a tenner and losing hours troubleshooting.
Who should buy it? Anyone expanding an APC Smart-UPS X system where you’ve decided the additional battery capacity is worth the spend (e.g., comms rooms, server cabinets, VoIP, small offices with sensitive kit). Who should *not* buy it? If you don’t already have the right Smart-UPS X battery pack plan, or if you’re hoping to “make do” with mismatched UPS models/cabling—don’t. Get the right kit first, otherwise this becomes an expensive cable that doesn’t solve the actual runtime problem.

APC
APC NetShelter - Rack (vertical) - soundproof - AC 100-230 V - maple - 12U - 19" - TAA Compliant - for P/N: SMTL1500RMI3UC, SRT2200RMXLAUS, SRTL3KRM1UC, SRTL3KRM1UNC, SRYL20K20RMXLT

APC
APC IT Power Distribution Module - Automatic circuit breaker (plug-in module) - AC 400 V - 3-phase - output connectors: 1 - for P/N: SY16K48H-PDNB, SY32K48H-PDNB, SY48K48H-PDNB, SY64K96H-NB, SY96K160H-NB, SY96K96H-NB

APC
APC - Rack rail kit - 19"

APC
APC Symmetra RM 8-12kVA Battery Module