
IEI MiniMax 3 Installation/Programming Manual Section 4: Troubleshooting
4.4 Lithium Battery Replacement
The lithium battery used for keeping the time and date is located on the upper left corner of the Door Control Module. The battery
holder is labeled “BT1.”
To replace the battery, first power down the module using the On/Off switch (SW1-SW4) located on the backplane. Then remove the
battery carefully by lifting it out of the holder.
Replace the battery with a Renata CR1225 or Varta CR1225 3 Volt Lithium battery. Use of another battery may present a risk of fire
or explosion.
Document #: 6055672, Rev 1.0 D1c Page 47 of 48
WARNING: The battery may explode if mistreated. Do not
recharge, disassemble, or dispose of in a fire.