Name: CyberPower RBP0129 UPS battery Sealed Lead Acid (VRLA) 48 V
Brand: CyberPower
SKU: 395d003d-7c51-4b78-bd48-00ee53e71d39
Availability: InStock

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Description

The RB1290X4J UPS Replacement Battery Cartridge restores life to CyberPower UPS systems that have weak or completely depleted internal batteries. The RB1290X4J contains four 12V/9Ah batteries, certified to meet or exceed original manufacturer specifications. This leak-proof, sealed lead-acid battery never requires replacement fluid. The pre-assembled cartridge installs easily into your CyberPower UPS system and is shipped with reusable packaging for delivering expired batteries to a suitable recycling center. The RB1290X4J comes with instructions, recycling information, and an eighteen-month warranty.Sealed Lead-Acid BatterySupplies high surge currents, provides robust power-to-weight ratios, and is cost-effective.Maintenance-Free Battery FluidNever requires replacement.Leak-Proof CasingProtects the sealed lead-acid battery and prolongs battery life.User-Installable CartridgeAllows for quick and convenient installation; each cartridge is pre-assembled.Reusable PackagingProvides for conveniently delivering expired batteries to a recycling center. After installing the new cartridge, place the old one in the reusable packaging.OEM CertifiedCyberPower batteries meet or exceed original manufacturer specifications.Eighteen-Month WarrantyCovers defects in materials and workmanship in the product under normal use and conditions within eighteen months of the purchase date. See warranty for details.WARNING:This product can expose you to chemicals including Lead and lead compounds and Styrene, which are known to the State of California to cause cancer, and Bisphenol A (BPA), which is known to the State of California to cause birth defects or other reproductive harm.

Specifications

Battery technology	Sealed Lead Acid (VRLA)
Battery voltage	12 V
Battery capacity	9 Ah
Number of batteries included	4 pc(s)
Product colour	Black
Compatibility	PR1500RT2U, PR1500RTXL2U, PR2000RT2U, PR2000RTXL2U, PR2200RT2U, PR2200RTXL2U, PR3000RT2U, PR3000RTXL2U, PR1500RT2UN, PR1500RTXL2UN, PR2000RT2UN, PR2000RTXL2UN, PR2200RT2UN, PR2200RTXL2UN, PR3000RT2UN, PR3000RTXL2UN
Weight	10.9 kg
Width	208 mm
Height	66 mm
Depth	315 mm
Package width	365.8 mm
Package height	165.1 mm
Package depth	480.1 mm
Package weight	11.9 kg

Full specifications

Marque	CyberPower
Référence fabricant	rbp0129
EAN	0649532619825

Why choose the CyberPower RBP0129 UPS battery Sealed Lead Acid (VRLA) 48 V in 2026?

The CyberPower RBP0129 UPS battery Sealed Lead Acid (VRLA) 48 V is a well-regarded reference in the Informatique category. In 2026, it remains one of the most relevant choices for those seeking to balance quality and budget. The brand CyberPower has a strong reputation among consumers, reflected in its consistent availability across many partner retailers. Thanks to our comparison tool, you can see all available offers at a glance and go directly to the retailer of your choice to complete your purchase with confidence.

Technical analysis of the CyberPower RBP0129 UPS battery Sealed Lead Acid (VRLA) 48 V

Among the main strengths of the CyberPower RBP0129 UPS battery Sealed Lead Acid (VRLA) 48 V, the most notable are its competitive pricing from £226.73 and the recognition of the CyberPower brand. Buyers who have already used this type of product in the Informatique category generally highlight the effectiveness of the core functions and ease of maintenance. It is a product that suits both first-time buyers and those replacing existing equipment, with a short learning curve and stable performance over time.

What the tech specs reveal

The CyberPower RBP0129 UPS battery Sealed Lead Acid (VRLA) 48 V spec sheet details the specifications that make a difference in daily use. For a savvy buyer, this data allows objective comparison with other products in the Informatique category. CyberPower publishes precise specifications that make comparison easier and help you make an informed purchase decision. Consult the technical specifications table on this page for full details. The CyberPower PDU44302 power distribution unit (PDU) 18 AC outlet(s) 2U Black from the same brand may also interest you for a direct comparison.

In practice day to day

In daily use, the CyberPower RBP0129 UPS battery Sealed Lead Acid (VRLA) 48 V is designed to fit easily into the regular habits of Informatique users. CyberPower has optimised this model for regular use, with accessible features and simplified maintenance.

Market price ranges in 2026

Range	Indicative price	For whom	What you get
Entry-level	Under 391990 £	Tight budget, occasional use	Essential features, reliable for beginners
Mid-range	391990 £ to 914640 £	Regular daily use	Good value for money, solid performance
High-end	Over 914640 £	Demanding users	The best of the category, all advanced features

Before buying the CyberPower RBP0129 UPS battery Sealed Lead Acid (VRLA) 48 V, remember to check the total price including delivery costs. On Compiral, sorting by total price lets you immediately identify the best offer among all listed retailers. Comparing return conditions and the warranty period offered by each retailer is also a good habit before finalising your order in the Informatique category.

Frequently asked questions about CyberPower RBP0129 UPS battery Sealed Lead Acid (VRLA) 48 V

Is the CyberPower RBP0129 UPS battery Sealed Lead Acid (VRLA) 48 V in stock?

Stock availability for the CyberPower RBP0129 UPS battery Sealed Lead Acid (VRLA) 48 V is updated in real time on Compiral. Retailers showing "In stock" can usually deliver quickly, often within 2 to 5 working days. If the product is temporarily out of stock at one retailer, check the other offers in our table. Check back regularly as stock levels change frequently in the Informatique category.

Where can I buy the CyberPower RBP0129 UPS battery Sealed Lead Acid (VRLA) 48 V at the best price?

To buy the CyberPower RBP0129 UPS battery Sealed Lead Acid (VRLA) 48 V at the best price, compare all available offers in our table at the top of this page. The 1 offer listed include delivery costs to give you the true total cost. Sort by ascending price and filter by free delivery to quickly identify the best deal among our verified partner retailers.

How does the CyberPower RBP0129 UPS battery Sealed Lead Acid (VRLA) 48 V compare to competitors in the Informatique category?

In the Informatique category, the CyberPower RBP0129 UPS battery Sealed Lead Acid (VRLA) 48 V occupies a specific market segment. Compared to other available models, it stands out mainly through the balance between its features and its price. To compare objectively, consult the detailed spec sheet on this page and compare specifications with other similar products listed on our comparison tool.

Is the CyberPower RBP0129 UPS battery Sealed Lead Acid (VRLA) 48 V suitable for beginners?

Yes, the CyberPower RBP0129 UPS battery Sealed Lead Acid (VRLA) 48 V is generally appreciated by both beginners and regular users of the Informatique category. It is quick to set up and CyberPower usually provides clear documentation. If you are new to this product category, consult the spec sheet on this page to identify the key criteria to check before making your choice.

Is there a refurbished version of the CyberPower RBP0129 UPS battery Sealed Lead Acid (VRLA) 48 V?

Refurbished versions of the CyberPower RBP0129 UPS battery Sealed Lead Acid (VRLA) 48 V may be available from certain Compiral partner retailers. These refurbished products allow you to save between 20% and 40% compared to the new price while still benefiting from a warranty. Check availability in our offers table and review the warranty conditions offered by the retailer.