Sonic Impact Technologies Sonic Impact Video-55 - Manual (Page 13)

e. The battery should be stored at a temperature of 15-25°C. Please do not expose the battery to
excessively low or high temperatures. Please do not store the battery in a dusty environment.
f. If the battery is to be stored for a long time, it is recommended to charge/discharge the battery
once every year. Use the battery in the main unit until it is discharged. Then, recharge the
battery and store it.
g. If the battery cannot be charged or the playing time is very short, it means that the service life
of the battery has expired. It is necessary to replace it with a new battery. (Please follow the
battery replacement instructions.
ATTENTION: Only a battery with the same specifications designated by SI
can be used. To do otherwise can be dangerous.
3) Replacing the lithium-ion battery
To replace the lithium-ion battery, please disassemble and install the parts as shown below.