Product Description
The Mitsubishi MR-J3BAT is a compact, lightweight, non-rechargeable 3.6V, 2400mAh lithium battery (20mm x 68mm x 25.5mm, 0.052kg) with wire lead connectors, designed as a reliable OEM replacement for devices like Mitsubishi AA-3.6-018A and MELSERVO MR-J3 series. Its 2600mAh capacity powers CNC machines, servers, PLCs, and more, making it suitable for diverse applications due to its superior chemistry and easy installation.
Is Your Device Showing These Signs?
The Mitsubishi MR-J3BAT battery commonly experiences issues related to low voltage, resulting in alarms and preventing servo amplifier operation. Technicians address this by replacing depleted batteries with new, high-quality replacements to ensure proper power supply to the encoder and memory backup. Corrosion on the battery connector and surrounding components is cleaned or the connector is replaced to establish a reliable electrical connection. Parameter loss due to battery failure is resolved by reloading the correct parameters into the servo drive's memory, restoring functionality.
Technical specifications
The Mitsubishi MR-J3BAT is a 3.6V, 2400mAh lithium battery, a lightweight and compact OEM replacement for devices like Mitsubishi AA-3.6-018A and MELSERVO MR-J3 series, suitable for CNC machines, servers, PLCs, and more.
Our Repair Process for the
MR-J3BAT
Our repair process for Mitsubishi MR-J3BAT battery issues begins with the immediate replacement of the depleted battery with a new, high-quality replacement to guarantee consistent power to the encoder and memory backup. Technicians meticulously clean any corrosion found on the battery connector and adjacent components; connector replacement occurs if cleaning is insufficient for establishing a secure electrical connection. Parameter loss is rectified by reloading the correct, verified parameters into the servo drive's memory, thereby restoring the system to its full operational capacity.
Your Guarantee: Warranty & Lifetime Support
Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.
Comprehensive Repairs You Can Depend On
We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.
Save Significantly
Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.


Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.
Buying Options
To receive a quote within 2 hours, please provide us with the details of your requirements. Our team will promptly review your request and send you a custom offer.
Ships from Rochester, NY