Replacing The Rtc Backup Battery - Sferalabs Iono Pi Max Series User Manual

Follow the battery manufacturer's instructions when installing the external UPS battery (not
provided).

Replacing the RTC backup battery

Iono Pi Max has a hardware real time clock with a dedicated long-life non-rechargeable
back-up battery.
Iono Pi Max is shipped with a CR1220 Lithium / Manganese Dioxide (Li/MnO2) battery
1
installed.
The battery is only used to power the RTC chip when the main power is not available.
Depending on operating conditions it should last up to two years if the Iono Pi Max is not
powered, more 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 100°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.
1 BR1220 batteries (Lithium Poly-carbonmonofluoride) can also be used, for improved shelf and
service life.
16 Iono Pi Max User Guide