Profile: Portaprompt Ltd. offers a wide range of discrete prompting solutions for conference requirements. We provide power pack, which is based on the tried and tested 24 ampere hour battery fitted to our previous power pack. We have added to its versatility by adding a step up DC to DC converter to provide the higher voltages required for today's laptops. It also provides two 12V DC outputs on industry standard 4 pin XCON sockets. The battery is protected against deep discharge damage with a low battery voltage drop out circuit.