Trojan 12V GROUP 31-GEL BATTERY - 2 required.
Fits: TASKI ULTIMAXX 1900 SD50, TASKI ULTIMAXX 2900 SD50
Genuine TASKI part number D6169202. Not sure it fits your machine? Send us your model and serial number at help@sweepscrub.com or call 877-449-0447 and we will confirm before you order.