Vivax Auxiliary Rechargeable Battery – 12V DC
The Aux Battery 12V DC is a useful addition to the receiver battery packs. To use the Aux Battery, replace the alkaline pack with the Aux Battery pack.
If the receiver has two battery indicators the long horizontal battery icon refers to the charge condition of the Aux Battery. to charge the Aux Battery, remove the pack from the receiver, connect to the receiver battery charger and charge as indicated in the usual way.