IRiver ChromeX iMP-150 User Manual page 31

ABOUT POWER SUPPLY (BATTERY)
Using general batteries:
Open the battery cover on the back of the player.
Insert batteries matching + and - and close the battery cover.
Manganese batteries are not recommended as they run out
quickly. For the best playing duration, Alkaline batteries are
recommended.
CAUTION!
Do not mix rechargeable batteries with dry batteries.
Do not use different types of batteries together.
When the batteries are not to be used for a long time, remove
them.
If battery leakage occurs, wipe off any residue in the battery
compartment and install new batteries.
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