Daiwa MARINEPOWER-3000 - Manual (Page 5)

3
About the power source
Battery indicator
This reel is made to accept DC12 Volt power only. Power sources
providing other than DC12 Volt power cannot be used. Power
provided by a boat can be unstable. In this instance, we
recommend the use of a compact deep cycle marine battery.
With power on, digits of the inverse counter (counter in the lower
area) will blink if voltage and mark gets below DC 9 V.
If the display shows this when the motor is not running, then
battery voltage is likely to be low. In this case, replace the battery
with a recharged one.
Attention
Make sure of the following before departure.
1. Recharge the battery before your fishing trip. Over time, a battery can naturally discharge.
2. Confirm the boat can provide the proper power source (i.e. voltage, connector shape etc).
3. Corroded connections can prevent the flow of electric current. Remove any corrosion or
dirt from the connectors.
This figure shows the
voltage is 8.5 V
Power source