Siemens SIMATIC TP 270 Operating Instructions Manual page 214

Maintenance/Service
11.2 Replacing the optional backup battery
Warning
The lithium battery can explode if not handled properly. The lithium battery should:.
- never be charged
- not be opened
- not be short-circuited
- be safeguarded against reversed poling
- not be exposed to temperatures in excess of 100 °C
- be protected against direct sunlight
Do not allow condensation to form on batteries.
If you have to ship a battery, ensure compliance with the Dangerous Goods Ordinance for
the shipping agent concerned (coding obligation).
Treat used lithium batteries as special waste. Pack them separately in leakproof plastic bags
for disposal.
See also
ESD guidelines (Page A-2)
Interfaces (Page 4-6)
Backup battery (Page 1-12)
11-4
TP 270, OP 270, MP 270B (WinCC flexible)
Operating Instructions, Edition 03/2004, 6AV6691-1DD01-0AB0