BL4S200 User’s Manual
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B.2.1 Replacing the Backup Battery
The battery is user-replaceable, and is fitted in a battery holder. To replace the battery, lift
up on the spring clip and slide out the old battery. Use only a Renata CR2032 or equivalent
replacement battery, and insert it into the battery holder with the + side facing up.
NOTE:
The SRAM contents and the real-time clock settings will be lost if the battery is
replaced with no power applied to the BL4S200. Exercise care if you replace the battery
while external power is applied to the BL4S200.
Cycle the main power off/on after you install a backup battery for the first time, and when-
ever you replace the battery. This step will minimize the current drawn by the real-time
clock oscillator circuit from the backup battery should the BL4S200 experience a loss of
main power.
NOTE:
Remember to cycle the main power off/on any time the RabbitCore module is
removed from the BL4S200 main board since that is where the backup battery is
located.
Rabbit’s Technical Note TN235,
External 32.768 kHz Oscillator Circuits
, provides addi-
tional information about the current draw by the real-time clock oscillator circuit.
CAUTION:
There is an explosion danger if the battery is short-circuited, recharged,
or replaced incorrectly. Replace the battery only with the same type or an equivalent
type recommended by the battery manufacturer. Dispose of used batteries according
to the battery manufacturer’s instructions.
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