6InstallationInstallationInserting the standard batteryAastra 610d, 612d, 620d, 622d, 650cPush the battery cover downwards until it disengagesfrom the locking mechanism and lift off. Insert the bat-tery with the contacts downwards. Replace the batterycover and push upwards until it snaps into place.Aastra 630d, 632dUndo the two screws on the back of the handset with asuitable tool and remove the cover. Insert the batterywith the contacts downwards, close the battery com-partment with the cover (insert underneath, pressdown from above) and screw back in place. Do notdamage the rubber seal when assembling.Inserting the power batteryYou can order a battery with higher capacity(power battery) for the Aastra 620d, 622d, 630d ,632d and 650c as an accessory (see page 83).This battery has a thicker design so you need anotherbattery cover that protrudes approx. 6 mm beyond therear of the device.Install the new battery cover as described above.Please remove any installed fixing bracket before inser-ting the power battery and securing the battery cover.