The 31503-01 IBM RAID Controller Battery is a genuine replacement component designed specifically for IBM RAID controller systems. Identified by the part number MR10M, this battery provides backup power to maintain data integrity during temporary power interruptions, ensuring that RAID arrays continue to operate without loss. It is compatible with both SAS (Serial Attached SCSI) and SATA (Serial ATA) storage interfaces, making it suitable for a range of IBM server configurations. Constructed with nickel‑metal hydride (NiMH) chemistry, the battery delivers reliable, rechargeable performance consistent with IBM’s original specifications, offering a straightforward upgrade or replacement solution for enterprise environments.