Replacement battery fits 5 Teletec compatible models. Specifications: 2000mAh, 7.2V, Ni-MH. Compatible with: Schwing Betonpumpe AK2, 10191556, AK2 Transmitter, AK2 Transmitter FW24, AK2 Transmitter FW43. Replaces: Schwing 491001057, Teletec RTE7220. Teletec replacement battery designed for Remote Control devices. Simple plug-and-play replacement requiring no modification.