The Bowman VHF manpack battery has an average battery life of approximately four years, based on delivery of 300 life cycles. Within these parameters, the VHF radio battery is expected to last between six to 12 hours before it requires recharging, dependent on the intensity of use and the life cycle history.
There are several types of Bowman radio, which differ in range dependent on radio type, power, antennae, terrain and weather conditions. I am withholding further information as its release would, or would be likely to, prejudice the capability, effectiveness or security of the armed forces.
The Ministry of Defence is not aware of any representations specifically on the longevity of the VHF manpack batteries used in Bowman radios.