Replacement battery for MettlerToledo E4 XLS+. Specifications: 1100mAh, 3.7V, Li-ion. Compatible with: MettlerToledo E4 XLS+, E4 pipette, E4 XLS+. Replaces: MettlerToledo E4-BATT, Rainin 6109-031, Rainin E4-BATT, Rainin RA 17012337. Rainin replacement battery designed for Medical devices. Designed to match the original manufacturer’s performance.