Description
Vertiv Liebert AS4 5kVA Scalable to 20kVA N+1 – AS4A0NCUGNNXLKB: Replacement Battery
The Liebert AS4 5kVA Scalable to 20kVA N+1 – AS4A0NCUGNNXLKB runs on a serviceable battery system that requires periodic replacement. This pack is built to the original equipment specification and tested to factory tolerances.
Fits These UPS Units
- Vertiv Liebert AS4 5kVA Scalable to 20kVA N+1 – AS4A0NCUGNNXLKB
Technical Specifications
- Cell chemistry: VRLA sealed lead-acid (no maintenance, no electrolyte top-up)
- Designed for: High-rate discharge under sustained UPS load
- Stored charge retention: Excellent, minimal degradation in standby
- Mechanical: Vibration-rated, factory-sealed against leakage
- Form factor: Drop-in compatible, no bracket modification required
Build Standards
- Certified to U.L. and CE specifications
- Brand new, never used
- Warranty: Vertiv manufacturer warranty applies; the term varies by model
What’s Included
- One Vertiv UPS unit for the Vertiv Liebert AS4 5kVA Scalable to 20kVA N+1 – AS4A0NCUGNNXLKB
- Installation guidance (see below)
Before You Install
Schedule the swap into your next maintenance window. Capacity should hold for 5-10 minutes off battery during the swap on most units; verify your specific Liebert AS4 5kVA Scalable to 20kVA N+1 – AS4A0NCUGNNXLKB bypass behaviour first.
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Ships nationwide from our Canadian warehouse · Email Us
UPS service and replacement batteries for Vertiv and Liebert systems, since 2012.

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