User Manual
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Power / Battery/Power setting
• Remaining battery charge
When a “Low Battery!” warning appears, immediately 
turntheunitoandreplacethebatteries,orswitchto
an AC adapter.
If  the  remaining  battery 
charge  becomes  low,  
“Low  Battery”  will  be 
shown  every  two  sec
-
onds  and  the  unit  will 
soonturno.
NOTE:
Usable batteries
You can use conventional alkaline and nickel metal hydride 
rechargeable batteries.
Power supply from USB
Connect  a  USB  cable  that  is  already  connected  to  the 
computer to the unit while it is o. Power will be supplied by 
USB bus power and the unit will turn on automatically. This 
function is only available when the H4n Pro is used as an SD 
card reader or an audio interface.
HINT:
To measure the battery charge accurately
The  remaining  battery  charge  can  be  measured  more 
precisely by using the H4n Pro battery type setting.
Date and time setting retention
If  the  batteries  die  or  the  power  supply  is  interrupted,  the 
H4n Pro will retain the date and time setting for about three 
minutes. After this, these settings will be reset to their default 
values.
Power supply indicator
Using batteries Using AC adapter
Ref. 
☞
 USB bus power 
P.033
Ref. 
☞
 Battery type 
P.130










