NiCD Replacement for Uniden BT294 Battery - Fits SPH21 (also works with Uniden SPU21) Looking for reliable performance from your Uniden SPU21 Two-Way Radio? Our Uniden SPU21 battery will provide you the performance and dependability that you demand for your Two-Way Radio. With an efficient rating of 7.5V Volt and 800mAh , you never have to worry about being too far from an ac outlet. Our line of Uniden SPU21 batteries are precision-engineered and rigorously tested for voltage, capacity, compatibility and safety to exceed original equipment manufacturer specifications. With an industry leading warranty and customer service, you can’t go wrong. ... More Info