---
product_id: 31039101
title: "12V 9AH Replacement Battery for CyberPower RB1290 UPS"
brand: "mighty max battery"
price: "¥15279"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/31039101-12v-9ah-replacement-battery-for-cyberpower-rb1290-ups
store_origin: JP
region: Japan
---

# 12V 9AH powerhouse Wide temp resilience UL Certified safety 12V 9AH Replacement Battery for CyberPower RB1290 UPS

**Brand:** mighty max battery
**Price:** ¥15279
**Availability:** ✅ In Stock

## Summary

> 🔋 Power up your peace of mind—never get caught powerless again!

## Quick Answers

- **What is this?** 12V 9AH Replacement Battery for CyberPower RB1290 UPS by mighty max battery
- **How much does it cost?** ¥15279 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/31039101-12v-9ah-replacement-battery-for-cyberpower-rb1290-ups)

## Best For

- mighty max battery enthusiasts

## Why This Product

- Trusted mighty max battery brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Reliable Power Backup:** 12V 9AH capacity ensures your UPS never misses a beat during outages.
- • **All-Weather Performance:** Operates flawlessly across extreme temperatures, from freezing cold to scorching heat.
- • **Maintenance-Free Design:** Sealed Lead Acid technology means zero hassle—just install and forget.
- • **Certified Safety Assurance:** UL certification guarantees top-tier quality and peace of mind.
- • **Shock & Vibration Resistant:** Built tough to withstand daily wear, perfect for dynamic work environments.

## Overview

The Mighty Max ML9-12 is a 12V 9AH sealed lead acid rechargeable battery designed for CyberPower RB1290 UPS systems. UL certified and maintenance-free, it delivers reliable, high-discharge power with resistance to shocks, vibrations, and extreme temperatures. Compact and durable, it ensures long-lasting performance backed by a full one-year warranty.

## Description

Mighty Max Battery 12V 9AH Replacement Battery for CyberPower RB1290 UPS

## Features

- ML9-12 SLA is a 12V 9AH Sealed Lead Acid (SLA) rechargeable maintenance free battery - UL Certified
- Dimensions: 5.94 inches x 2.56 inches x 4.02 inches. Terminal: F2. Listing is for the Battery only. No wire harness or mounting accessories included.
- SLA / AGM spill proof battery has a characteristic of high discharge rate, wide operating temperatures and long service life.
- Rechargeable battery that can be mounted in any position, resists shocks and vibration. Long lasting high performance in high and low temperatures.
- Full One Year Warranty

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Mighty Max Battery |
| Brand | Mighty Max Battery |
| Model | ML9-1294286BFBA |
| Item Weight | 5.1 pounds |
| Product Dimensions | 5.94 x 2.56 x 4.02 inches |
| Item model number | ML9-1294286B |
| Batteries | 1 12V batteries required. (included) |
| Manufacturer Part Number | ML9-1294286B |
| Amperage | 9 Amps |
| Voltage | 12 Volts |
| Wattage | 108 watts |

## Product Details

- **Brand:** Mighty Max Battery
- **Battery Cell Composition:** Lead Acid
- **Product Dimensions:** 4.02"D x 2.56"W x 4.02"H
- **Voltage:** 12 Volts
- **Color:** Black

## Images

![12V 9AH Replacement Battery for CyberPower RB1290 UPS - Image 1](https://m.media-amazon.com/images/I/61ETlI4-RLL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Hello there, So is this truly compatible with cyberpower cp1000avrlcd ups? Thank you!**
A: Yes, it is.
I have 3 CyberPower UPS, 2 of which are CP1000s, and it worked with all of them.

**Q: Any idea if this would be a proper fit for the cyberpower 1500 pfclcd?  thanks!**
A: I recommend going to the Cyberpower website and find out the number of the replacement battery for your unit.  I called cyberpower and they told me which battery I needed.  Then I went to amazon and ordered it.  I'm not at all certain, but I don't think this battery is the proper one for your unit.  Some cyberpower upses take 2 batteries.

**Q: Will this work for ion block rocker ipa56c?**
A: Yes it should.  This battery was excellent and was fully charged and ready to go.  I Gave this to a leader of the folks dancer group to be used outside the closed building with excellent result!

**Q: My ups requires a replacement battery model rb1290a.  is this compatible?**
A: Yes, it is.

## Frequently Bought Together

- Mighty Max Battery 12V 9AH Replacement Battery for CyberPower RB1290 UPS
- CyberPower CP1500PFCLCD PFC Sinewave UPS System, 1500VA/1000W, 12 Outlets, AVR, Mini Tower,Black
- APC UPS 1500VA UPS Battery Backup and Surge Protector, BX1500M Backup Battery Power Supply, AVR, Dataline Protection

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**Shop now:** [https://www.desertcart.jp/products/31039101-12v-9ah-replacement-battery-for-cyberpower-rb1290-ups](https://www.desertcart.jp/products/31039101-12v-9ah-replacement-battery-for-cyberpower-rb1290-ups)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-27*