The battery pack of the GEONAV allows you to use it as a portable unit. Use 4 alkaline cells or rechargeable batteries, AA size (if possible, high-capacity batter- ies, 2000mAh or higher). Make sure that the unit is off and dry when replacing the batteries. To access the battery slot, loosen the lock- ing screws by means of a coin or the round side of a key, as shown in the figure. Extract the battery pack, flip it over andloosen the cover locking screws.Remove the cover and insert the batter- ies according to the polarity indicated. Make sure that the “Battery type” selec-tor located in the cartridge slot is posi- tioned correctly, according to the type of battery used (“Rechargeable” position,for rechargeable batteries; “Alkaline” po-sition, for alkaline batteries). To change the selection, move the small lever by means of a sharp object. Battery pack When removing the lighter adapter, connections are the fol- lowing:red (or white)+(+12V)black- (ground) Connections WARNING: All the units are supplied with the batteryselector set to Alkaline. When using alkaline batter- ies, the selector has to be set to Alkaline. You arewarned NEVER to use alkaline-type batteries if the selector is set to Rechargeable. In this case the unitcan be seriously damaged. This kind of damage is not covered by the warranty. When using rechargeable 12 Check that the contacts in the batterypack are clean and dry. Before reassembling the battery pack, make sure that the rubber gasket in the slot and the rubber O-rings tightening the locking screws are clean and in the correct position.The misplacement of the gaskets, together with any presenceof sand, saline residues or dirt, may be detrimental to the tightness of the battery slot since it allows moisture to pen- etrate into the unit and damage the electronic inner compo- nents. This kind of damage is not covered by the warranty. Reassemble the battery pack carrying out the disassembly op- erations in reverse order. Should the battery pack not fit, or fit with difficulty in its seat, check that the CompactFlash™ is correctly inserted. The partial extraction of the CompactFlash™ blocks the in- sertion of the battery pack.The unit can be powered by the batteries only or connected toan external power supply. When the unit is powered by the power supply cable, the inner batteries - if they are of re- chargeable type - are fully recharged, after which the inner battery boat charger is automatically disabled and the batteries dis- connected in order to keep their charge. batteries, the selector can be set either toRechargeable or to Alkaline. Howeverthe battery charge function is active on con- dition that the selector is set to Recharge-able. The misplacement of the selector may cause the batteries to break, the corrosive liquid to leak out and, consequently, the unit to be damaged. This kind of damage is not covered by the warranty. EnglishEnglish 13