We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
A single 6V 4.5Ah sealed lead-acid battery in a rectangular plastic case

RefurbUPS

RefurbUPS MK ES4-6 6V 4.5Ah UPS replacement battery

SKU CH-PCZT-MZYEX

A 6 V 4.5 Ah sealed lead-acid cartridge that restores runtime to compatible UPS units

  • TypeKit/Package
  • Weight3
  • High-rate discharge design delivers reliable backup power
  • 6 V 4.5 Ah SLA chemistry suits UPS applications
  • Factory-fresh cells ensure immediate readiness
  • Single-battery cartridge simplifies replacement procedure
  • Comprehensive installation instructions support confident DIY fitting

Compatible 6 V 4.5 Ah replacement battery

This sealed lead-acid unit is a factory-fresh MK ES4-6 compatible cartridge intended for UPS systems that require a 6 V 4.5 Ah high-rate discharge cell. It suits administrators maintaining existing power-protection equipment.

Sustained discharge performance

The high-rate discharge chemistry is built to deliver the current spikes a UPS demands during extended outages rather than brief transients. Internal resistance remains stable through the discharge curve, supporting reliable runtime until mains power returns.

Lead-acid voltage and capacity limits

A single 6 V cell constrains the pack to nominal voltages and capacities defined by the SLA format, so series strings are needed for higher-voltage UPS chassis. The 4.5 Ah rating fixes total energy storage, limiting autonomy for a given load.

Highlights

  • High-rate discharge design delivers reliable backup power
  • 6 V 4.5 Ah SLA chemistry suits UPS applications
  • Factory-fresh cells ensure immediate readiness
  • Single-battery cartridge simplifies replacement procedure
  • Comprehensive installation instructions support confident DIY fitting

Specifications

BrandMK Battery
SeriesMK Battery
TypeKit/Package
Weight3

Questions about this item

How much heat or noise does the MK ES4-6 battery produce during continuous use?

The sealed lead-acid MK ES4-6 battery operates silently with no moving parts and generates minimal heat under normal float charging conditions.

What existing UPS hardware is required to install this MK ES4-6 replacement cartridge?

You need a compatible UPS unit that accepts a single 6 V 4.5 Ah high-rate discharge SLA battery and provides the standard F1/F2 terminal connections.

Will this MK ES4-6 battery work reliably in an older UPS that has been in service for several years?

Yes, the factory-fresh MK ES4-6 is designed as a direct drop-in replacement and the included instructions guide installation in legacy UPS models.

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.