the unserviceable Clansman NICAD battery. Later an intelligent battery management system (IBMS) was provided which automatically conditioned one or more batteries, a process which ensured only complete charge cycles were applied, in order to avoid the NICAD memory effect. The PRC 349 was originally intended for use with 1.5V AAA Alkaline batteries and provided with a cassette to hold them. As these became more expensive a variety of mains adapters, nickel cadmium batteries and Lithium batteries came into service. The PRC 350 had its own 14V 4Ah NICAD and a battery cassette holding 14 primary Alkaline or Dry Cells giving a nominal rated voltage of 21V. A lithium version was later introduced as a lightweight replacement for the 24V 4Ah NICAD. Vehicle Sets. These were nominally 24 Volt and were powered by lead acid batteries which were charged by the vehicle alternator, an auxiliary engine fitted to the vehicle, or a charging engine or generator – particularly when ground mounted or static. AC Adapters, Transformers and Switched Mode Power Supplies. A number of AC Mains units were provided so that sets could be used in barracks. Later – a series of adaptors such as the ADAPTER CHARGER DC 14.4/24.V. came into service which when added to the DCCU could be used to charge multiple and various batteries – charging 2x 14V or 2x 24V NICADS for example. Clansman Control Harness and accessories Clansman Control Harness refers to a range of accessories which were fitted into vehicles for the purpose of controlling the set(s) and providing other features such as loud speakers, a vehicle intercom system, and switching between two radio sets. Control boxes provided the switching and facilities to plug the audio gear into. Green or black faced control boxes were the standard type. Later, yellow faced boxes were introduced that supported Automatic Noise Reduction (ANR) functionality. These required new headsets to be used with them to work properly, although the older ones were still compatible. Red faced control boxes were used for encrypted systems. Clansman audio gear A range of audio gear for use in various roles are commonly provided such as the Lightweight 'B' Vehicle and Infantry Headset (Headset BV and I), the Clansman Handset, a Pressel (Press to Talk or PTT) switch and the Audio Gear Staff User (AGS). The AGS featured Sonovalve technology – a feature designed to allow background noise into the headset through a