Replacement battery for Zeegma Zonder Robo. Specifications: 2600mAh, 14.4V, Li-ion. Compatible with: Zeegma Zonder Robo, Aspiri Robo. Replaces: Zeegma INR18650-4S1P, Overmax INR18650-4S1P. Overmax replacement battery designed for Vacuum devices. Simple plug-and-play replacement requiring no modification.