Lenovo ThinkPad Edge E420s - Manual (Page 9)

Rechargeable battery notice
DANGER
Do not attempt to disassemble or modify the battery pack. Attempting to
do so can cause an explosion, or liquid leakage from the battery pack. A
battery pack other than the one specified by Lenovo, or a disassembled or
modified battery pack is not covered by the warranty.
If the rechargeable battery pack is incorrectly replaced, there is danger
of an explosion. The battery pack contains a small amount of harmful
substances. To avoid possible injury:
• Replace only with a battery of the type recommended by Lenovo.
• Keep the battery pack away from fire.
• Do not expose it to water or rain.
• Do not attempt to disassemble it.
• Do not short-circuit it.
• Keep it away from children.
• Do not drop the battery pack.
Do not put the battery pack in trash that is disposed of in landfills. When
disposing of the battery, comply with local ordinances or regulations.
The battery pack should be stored at room temperature, charged to
approximately 30 to 50% of capacity. We recommend that battery pack be
charged about once per year to prevent overdischarge.
Safety and Warranty Guide
vii