Sferalabs Iono Pi Max Series User Manual page 17

Once the circuit boards assembly is extracted from the enclosure, the most convenient
way to access the battery holder is to first separate the vertical board from the base board.
This is easily accomplished by unscrewing the two screws on the bottom side of the base
board, that secure the vertical board to it. Pay attention not to touch any of the electronic
components with the screwdriver head. Once the screws are removed, the vertical board
easily separates from the base. Be careful not to stress the board-to-board connector.
VERTICAL BOARD SCREWS
Use a non-conductive pin or small tool to help extract the battery from its holder. Insert the
new battery with a gentle push. You don't need tools to insert the battery. The battery is
held into place by a spring contact.
Be sure to insert the battery so that the negative (-) terminal is facing the vertical circuit
board, and touches the contact pad at the center of the battery holder, as shown in the
photo below. Reattach the vertical board to the base; use light torque to tighten the
screws.
Reversing the battery polarity may damage the product.
The real time clock will reset its time immediately when the RTC backup battery is
disconnected.
RTC BACKUP BATTERY HOLDER
17 Iono Pi Max User Guide