Sangean DT-300/DT-300V - Manual (Page 6)

Battery Installation
The battery cover is located on the back of the unit. Slide the cover in the
direction of the arrow to gain access to the battery compartment
insert 2 AAA(UM-4) batteries into the compartment.Make sure that
batteries are positioned in accordance with the diagram located below
batteries in battery compartment. Replace cover.
Note:
[1] A low battery icon E appearing on the LCD display indicates a weak
and replacement is necessary.
[2] To ensure that the preset memory and time are not lost during battery
replacement make sure that power on/off switch is in the off
position and that the batteries are replaced within 3 minutes.
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