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Single rectangular 12V 18A sealed lead-acid battery in plastic case

RefurbUPS

RefurbUPS MK ES20-12FR-HR 12V18A UPS replacement battery

SKU CH-5SHM-SNRKK

A 12 V 18 Ah sealed lead-acid battery kit that replaces 12 V 20 Ah units in compatible UPS systems

  • TypeKit/Package
  • Weight15
  • 12 V 18 Ah high-rate discharge battery powers critical UPS loads
  • Factory-fresh sealed lead-acid cells deliver reliable backup performance
  • Single-battery kit simplifies replacement without extra components
  • Weighs 15 units for straightforward handling and installation
  • Replaces 12 V 20 Ah models while maintaining compatibility

Product Identity

The RefurbUPS MK ES20-12FR-HR is a replacement battery cartridge for uninterruptible power supplies. It contains one sealed lead-acid battery rated at 12 volts and 18 ampere-hours. The unit weighs 15 units and arrives factory fresh with installation instructions included. It is designed to restore backup power to compatible UPS systems.

Fit and Limits

This kit suits administrators swapping a depleted 12V 18Ah high-rate cell in a supported UPS. It also fits installations where the original spec called for a 12V 20Ah MK battery, as the manufacturer notes this cartridge replaces that model. Buyers who need a fire-retardant rated case should look elsewhere because this replacement is not FR rated. Systems requiring a different voltage, capacity or form factor cannot use this cartridge.

Deciding Specification

The critical figure is the 18 ampere-hour capacity at 12 volts. The original equipment may have shipped with a 20 ampere-hour cell, but this cartridge delivers 18 ampere-hours. Confirm that the UPS runtime and charger parameters accept the lower capacity before ordering.

Highlights

  • 12 V 18 Ah high-rate discharge battery powers critical UPS loads
  • Factory-fresh sealed lead-acid cells deliver reliable backup performance
  • Single-battery kit simplifies replacement without extra components
  • Weighs 15 units for straightforward handling and installation
  • Replaces 12 V 20 Ah models while maintaining compatibility

Specifications

BrandMK Battery
SeriesMK Battery
TypeKit/Package
Weight15

Questions about this item

How often will the 12V18A SLA battery need replacement under normal UPS duty?

Sealed lead-acid cells typically last three to five years; plan on swapping the cartridge once runtime drops below your critical-load threshold.

What capacity limit appears first during a prolonged discharge at the rated 18 A rate?

The 18 amp-hour rating defines the total energy available; voltage will sag once that charge is exhausted, ending usable runtime.

Does the 15 kg battery kit generate noticeable heat or require active cooling during all-day float charging?

Valve-regulated lead-acid chemistry runs cool on float charge; no fan or extra ventilation is needed beyond normal UPS enclosure airflow.

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