The Mitsubishi MR-BAT6V1 is a high-capacity replacement battery specifically designed for the MELSERVO J4 series, ensuring extended operational reliability with its 1650mAh capacity and 6.0V output. Ideal for Mitsubishi CNC and servo systems, this battery supports long-term data retention, making it a crucial accessory for maintaining optimal performance in industrial automation applications. Compatible with the MR-J4 series, the MR-BAT6V1 is a dependable choice for ensuring uninterrupted operation of your servo systems.