Sferalabs Iono Pi Max v2 3+ Lite User Manual page 17

The battery is only used to power the RTC chip when the main power is not available.
Depending on operating conditions it should last three or more years if the Iono Pi Max is
5
not powered, or up to the battery's lifetime if it regularly receives external power.
The RTC backup battery holder is on the vertical circuit board, opposite the Compute
Module slot. In the Iono Pi Max, the battery is not accessible from the outside. You should
first remove the case body to gain access to the Iono Pi Max circuit boards assembly.
Follow the procedure described at the beginning of this chapter to open and replace the
case.
WARNING
Improper handling of lithium batteries can result in an explosion of the batteries and/or
release of harmful substances.
Worn-out or defective batteries can compromise the function of this product.
KEEP OUT OF REACH OF CHILDREN. Swallowing may lead to serious injury or death in
as little as 2 hours due to chemical burns and potential perforation of the esophagus.
Immediately see doctor.
Replace the RTC lithium battery before it is completely discharged. Replace the battery
every 5 years even if the battery is still working properly. The lithium battery must be
replaced only with an identical CR1220 or BR1220 battery.
Do not throw lithium batteries into fire, do not solder on the cell body, do not recharge, do
not open, do not short-circuit, do not reverse polarity, do not heat above 85°C and protect
from direct sunlight, moisture and condensation.
Dispose of used batteries according to local regulations and the battery manufacturer's
instructions.
NOTICE
Before opening the Iono Pi Max enclosure, disconnect all power sources and any
connection to external devices, including USB cables.
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.
5 Depending on environmental conditions.
17 Iono Pi Max User Guide