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ITGlossary · Batteries
User-Replaceable Batteries
UPS batteries that users can safely replace on their own, without needing a technician.
Technical level:Basic
In UPS units with user-replaceable batteries, the battery sits in an easily accessible compartment or door and connects with a plug, with no need to open the casing. On many models the change can be made while running (hot-swap), without interrupting power to the load.
This matters because batteries are the first component to wear out: standard VRLA batteries need replacing every 3–5 years, sooner in warm rooms. Easy replacement reduces cost and downtime, especially at remote sites.
Always use batteries of the same type, voltage and capacity, and replace them all together, not one at a time. Old lead-acid batteries must be handed in for recycling.
Related terms
- Hot-swappable BatteriesBatteries that can be replaced without turning off the UPS or disconnecting the load.
- Fast ChargingA charging method that restores battery capacity quickly without damage by controlling current, voltage and temperature.
- Battery Management System (BMS)A system that monitors and manages the performance, health, and charging of batteries.
- Deep-Cycle BatteryA battery designed to be discharged deeply and recharged again and again without wearing out quickly.
- Depth of Discharge (DoD)The share of a battery's capacity that has been drawn in a discharge, where 100% means fully discharged.
- Equalising ChargeA controlled charge at a higher than normal voltage that brings all cells of a lead-acid battery to the same state of charge.