Retevis RT29 RT29D RB23 HD2 Walkie Talkie. If you’re a fanatic ofAmateur Digital Radio or ham radios, especially HD1, this battery should be considered; it would be the best choice for HD1 Digital Radio.
As I've said for many years, if you have only one battery (no matter how charged or capacious) for a handheld radio, you don't really have a radio. It will receive for hours, but when you go to transmit, the battery will fail about the time you really need it. This goes double for emergency use radios, such as RACES, military, police, fire, Skywarn, etc.