the data collector has both a main power supply (two aa (lr6)-size alkaline batteries or a lithium-ion battery pack) and a backup power supply (lithium battery).

    in this manual, the words "main battery" refer to both alkaline batteries and the lithium-ion battery pack.

    low main battery power is indicated when the low voltage message appears on the lcd screen. replace the main battery or charge the battery pack as soon as possible after the low voltage message appears.

    note down valuable data

    never remove both the main battery and backup battery at the same time. doing so causes all program settings and data in data collector memory to be lost or changed. data cannot be recovered once it is lost or corrupted. be sure to make back-up copies of all important data. one way to do this is to use the optional basic cradle or satellite cradle to transfer data to a computer.

    1 never remove the main battery from the data collector while the power is turned on. doing so can cause data in data collector memory to be lost. before you remove the battery, be sure to turn the data collectoroff.

    2 use only aa (lr6)-size alkaline batteries or the specified lithium-ion battery pack specified for the dt-900.

    3 the lithium-ion battery pack discharges naturally during the time it takes to get to you from the factory. be sure to charge the battery pack before you use it for the first time.

    4 never allow the terminals of the lithium-ion battery to become shorted. doing so creates the danger of malfunction. be sure to keep the battery pack in its special case when transporting or storing it.

    5 repeat charging of the lithium-ion battery pack gradually shortens its ability to recharge. if you find that a fully charged battery pack provides only little operation time, it probably means you need a new battery pack.

    6 whenever you do not plan to use the data collector for a long time, load two new alkaline batteries or a fully charged battery pack into the data collector to protect against power failure during non-use. also, load new batteries or a fully charged battery pack before using the data collector after a long period of non-use.