Siemens SIMATIC Manual page 22

General technical data
1.3 Shipping and storage conditions for modules and backup batteries
Storing backup batteries
Always store backup batteries in a cool and dry place. The maximum storage period is 5
years
Handling backup batteries
Improper handling of backup batteries can result in injury and damage to property.
Improperly handled backup batteries may explode or cause severe burns.
Observe the following rules when handling the backup batteries used in the S7-300
automation system:
• Never charge the batteries
• Never heat the batteries
• Never throw the batteries in an open fire
• Never damage the batteries mechanically (drill, squeeze, etc.)
Note
Backup batteries
Do not dispose of batteries through household waste! Batteries are recyclable!
22
WARNING
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ