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
Two sealed lead-acid batteries in a replacement kit

RefurbUPS

RefurbUPS Belkin BU304000 UPS Replacement Battery Kit 6V 4.5Ah

SKU CH-810K-84S64

A compatible replacement kit containing two 6V 4.5Ah sealed lead-acid batteries for Belkin BU304000 UPS units

  • TypeKit/Package
  • Weight6
  • Two 6 V 4.5 Ah batteries power your UPS
  • Kit matches Belkin BU304000 specifications exactly
  • Factory-fresh sealed lead-acid cells ensure reliability
  • High-rate discharge design supports sudden load spikes
  • Step-by-step installation guide included for quick swap

Compatible Kit for Belkin BU304000

This replacement battery kit is designed for Belkin UPS units that require the BU304000 cartridge. It contains two sealed lead-acid batteries rated at 6V 4.5Ah each. The kit targets administrators and technicians who need to restore runtime to compatible Belkin UPS systems.

Includes Installation Instructions

The package supplies comprehensive UPS battery replacement installation instructions to guide the swap. Factory-fresh cells are intended to deliver reliable high-rate discharge performance from first use. No additional software or mounting hardware is mentioned in the specifications.

Dual 6V 4.5Ah Battery Configuration

The defining specification is the pair of 6V 4.5Ah SLA batteries that replicate the original cartridge layout. Buyers whose UPS requires a different voltage, capacity or physical form factor will not be served by this kit.

Highlights

  • Two 6 V 4.5 Ah batteries power your UPS
  • Kit matches Belkin BU304000 specifications exactly
  • Factory-fresh sealed lead-acid cells ensure reliability
  • High-rate discharge design supports sudden load spikes
  • Step-by-step installation guide included for quick swap

Specifications

BrandBelkin
SeriesBelkin Batteries
TypeKit/Package
Weight6

Questions about this item

How often should the two 6V 4.5Ah SLA batteries in this kit be replaced under typical UPS duty?

Expect a service life of three to five years; plan replacement when runtime drops below eighty percent of the original backup time.

What limits continuous discharge performance of the 6V 4.5Ah cells during an extended outage?

The 4.5Ah capacity and internal resistance of each high-rate SLA cell set the maximum sustained current before voltage sag ends useful backup.

How much heat do the two sealed lead-acid batteries generate when the UPS runs on battery all day?

Sealed lead-acid cells produce only modest warmth during discharge; normal cabinet airflow is sufficient to keep temperatures within spec.

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.