Radio Shack 20-501 ユーザーズマニュアル

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5 The 
Basics
powering your scanner
You can power your scanner from any of three 
sources:
internal batteries (not supplied)
standard AC power (using an optional 
AC adapter)
vehicle battery power (using an optional 
DC adapter)
Before installing batteries, set the switch in the 
battery compartment to match the type of batteries 
you will use. Select RECHARGEABLE for all 
non-alkaline battery types, including lithium, Ni-Cd 
and Ni-MH.
  Remove battery cover and set battery switch.