HESEDION Portable Electronic Keyboard
1. Daily Charging (No Need to Remove Batteries)
Power off the keyboard or slide the battery switch to O to cut off power.
Switch functions above the left-hand chord area:
O: Power off
I: Use Battery 1
II: Use Battery 2
Unplug the charger once fully charged. Do not charge overnight to avoid damaging batteries.
Charge when remaining power is around 20%, avoid full power drain. Switch between two batteries (I/II) alternately for outdoor use.
2. Battery Removal & Installation (For Replacement)
Cut off power
Slide the switch to O and disconnect the charger.
Open the rear battery cover
Place the keyboard upside down, unscrew all bottom screws and keep them safely.
Gently pry open the back cover along the gaps with a plastic prying tool.
Locate the two built-in batteries
Two built-in lithium batteries are placed side by side, each connected to the main board via a cable plug. Mark the positions of Battery I and Battery II.
Remove batteries
Pinch and pull out the white cable plug gently (do not pull the wires directly).
Lift up the batteries easily by pulling the battery pull straps at the bottom. Repeat for the other battery.
Install new batteries
Place new batteries in the original positions.
Align and firmly insert the cable plugs into the slots.
Fix batteries tightly with adhesive or hook-and-loop fasteners, then close the back cover.
