Motorola RLN6304 Two Hour Rapid Charger Kit for RDX Series Radios Motorola radio rapid charger kit Charges batteries in approximately 2 hours Compatible with the following RDV models: 2020, 2080, 5100 Compatible with the following Motorola RDU models: 2020, 2080, 2080d, 4100, 4160, 4160d Also compatible with Motorola CP110 models