The sky watcher 7ah rechargeable power tank is a multi purpose rechargeable power supply ideal for use with sky watcher synscan syntrek supatrak allview and virtuoso mountings it can also be used with computerised telescopes of other brands requiring a 12v dc power supply also a useful camping accessory device specifications multi purpose rechargeable power supply ideal for use with sky watcher synscan syntrek supatrak allview and virtuoso mountings and computerised telescopes