If youre a fanatic of Amateur Digital Radio or ham radios, especially HD1, this battery should be considered; it would be the best choice for HD1 Digital Radio.
Specification:
Voltage: 7.4V
Battery type: Li-ion
Battery capacity: 3200mAh
Color: Black
Weight: 140g
Compatible Model: HD1Retevis RT29 Walkie Talkie
Package includes: 1 x HD1 3200mAH Li-ion Battery