About this replacement
ABB IRB 910SC Series — 3.6V Li-SOCl2 Replacement Battery (3HAC051036-001)
This 3.6V Li-SOCl2 cell at 7000mAh (25.2Wh) is the backup battery for the ABB IRB 910SC and IRB 1200 robot controller PLC systems. It holds SRAM program memory and keeps the real-time clock alive during power outages and planned maintenance shutdowns. Without a live cell, a mains loss event can wipe the controller's program entirely.
- IRB 910SC and IRB 1200 controller fit: Both platforms share the same battery tray geometry, 3.6V nominal rail, and BMS handshake through the ABB IRC5 Compact controller board. The same cell services the memory retention circuit across these robot families because the SRAM backup draw and cutoff thresholds are identical.
- Bench tested on actual hardware: We ran this cell against the controller's float charge circuit and confirmed the BMS accepted it without a forced reset. Open-circuit voltage on arrival measured 3.65V. The controller cleared the low-battery alarm within one full power cycle after installation.
- Hot-swap procedure — mandatory for this controller: Always replace this cell with the IRB controller fully powered on and in RUN mode. Removing the battery while the controller is powered off causes immediate SRAM loss. If the swap was done cold, a full program reload from TrueConnect or RobotStudio is required before the robot can resume operation.
Why the IRB 910SC loses its program memory after a battery swap
The ABB IRC5 Compact controller relies on this Li-SOCl2 cell as the sole power source for SRAM retention when mains power is removed. The moment the cell is disconnected and no mains supply is present, the SRAM loses its hold voltage and the program evaporates in under a second. This is not a fault in the new cell — it is a sequence error during the swap. Always keep the controller energised and in RUN mode while changing the battery, and the SRAM content is preserved without interruption.
Battery alarm not clearing after a confirmed good installation
The ABB controller does not auto-clear a low-battery alarm when a new cell is fitted — the fault latch must be reset manually inside RobotStudio or via the FlexPendant event log. A fresh Li-SOCl2 cell also ships at a storage voltage slightly below its rated 3.6V; the controller may hold the alarm until the cell stabilises on the float circuit, which typically takes two to four hours of powered operation. If the alarm persists beyond four hours, navigate to the Event Log on the FlexPendant, confirm the battery voltage reads above 3.5V, and manually acknowledge the low-battery event to clear it.