The Motorola NNTN4497 the favorite battery used by owners of the CP150, CP200 and CP200D Radio owners. The original NNTN4497 has been revised over the years yielding new part numbers for each new improvement. The original battery known as the NNTN4497AR which was 1800 mAh, then came the NNTN4497AR which featured 1950 mAh. The newest version NNTN4497CR Battery which comes with a whopping 2190 mAh. But if you want even more talk time you can find the replacement battery for your CP150 Radio or your CP200 Radio or CP200 Radio you could choose the Command Tac heavy duty battery which carries an astonishing 2500 mAh. All of these Batteries come with the standard 1 year warranty but for my money the Command Tac is by far the best buy. The CP200D is the latest version of the CP200 Series Radios and the Command Tac will provide the longest talk time on the market. You can see the Command Tac NNTN4497 battery here.