かんたん携帯11 
オンラインマニュアル

Battery Cautions

Use specified Battery or Charger only.

Non-specified equipment use may cause malfunctions, electric shock or fire due to battery leakage, overheating or bursting.

Do not dispose of an exhausted Battery with ordinary refuse; always tape over Battery terminals before disposal.

Take Battery to a SoftBank Shop, or follow the local disposal regulations.

Charge Battery in ambient temperature 5oC - 35oC; Battery may leak/overheat and performance may deteriorate outside this range.