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APC – RBC4 – 28 WPC – Battery Pack Replacement Kit

Manufacturer

OEM Part Number

RBC4

GPS Part Number

58_GPS-RBC-4

Price:

$31.50

Specifications
View Spec Sheet
Voltage WPC AH/kVA Length Width Height Weight
12 Volt 28 12 AH N/A N/A N/A N/A
Voltage 12 Volt
WPC 28
Amp/H 12 AH
Length N/A
Width N/A
Height N/A
Weight N/A
APC Battery Cells โ€” Replacement AGM Cell for APC RBC4 Packs (Loose Battery Only)
12 V โ€ข 12 Ah Sealed Lead-Acid โ€ข For Rebuilding APC RBC4 Cartridges

These Gruber replacement AGM (VRLA) batteries are individual cells designed to match the form factor and electrical characteristics used in APC RBC4 battery cartridges. They are not a finished RBC4 module โ€” instead, they provide the high-quality 12ย V cell you need when you want to rebuild your existing APC tray and harness yourself.

A typical APC RBC4 cartridge is built from one 12ย V, 12ย Ah sealed lead-acid battery mounted in the original APC plastic tray and wired to the OEM harness. By reusing your existing bracket and cabling and installing a fresh cell, you can restore runtime and reliability while keeping more hardware out of the landfill.

Important โ€” What Youโ€™re Buying
  • Loose AGM cell only โ€” This is a stand-alone 12ย V, 12ย Ah VRLA battery.
  • Not a complete RBC4 cartridge โ€” No tray, harness, or APC plastic housing is included.
  • For DIY rebuilds โ€” Intended for users comfortable transferring the wiring and hardware from their original RBC4 into a new cell.
Category Detail
Intended Use Cell replacement for rebuilding APC RBC4 battery trays/harnesses
Typical RBC4 Build 1 ร— 12ย V, 12ย Ah sealed lead-acid battery in APCโ€™s OEM tray and wiring harness
Battery Chemistry AGM VRLA (maintenance-free, non-spillable)
Nominal Voltage / Capacity 12ย V, 12ย Ah per cell
Terminals Faston-style terminals compatible with OEM APC harness (reuse existing wiring and hardware)
Whatโ€™s Not Included No APC tray, harness, fuses, or labels โ€” loose cell only.
Why buy APC replacement cells from Gruber
  • UPS battery specialists โ€” Over 40 years working with UPS systems and refurbishing APC battery cartridges.
  • Fresh, matched inventory โ€” Cells are sourced from current stock and matched so your rebuilt RBC4 performs evenly and reliably.
  • DIY-friendly support โ€” Guidance on tray disassembly, wiring orientation, and safety best practices if you choose to rebuild your RBC4 yourself.

If you prefer a drop-in, ready-to-install cartridge, see our complete APC RBC4 replacement products. This listing is for technicians and DIY users who want to reuse their existing APC tray and harness while installing a new, high-quality 12ย V, 12ย Ah cell from Gruber Power Services.

Gruber Power Services