power supply symbol for ladder logic

Satellite phones​

Fish tank oxygen pumps​

LED emergency lights​

Children's electric toy cars​

To charge LED emergency lights as a backup lighting guarantee during camping

To power mini medical devices (such as electronic blood pressure monitors) to ensure health monitoring for campers​

To charge action cameras to ensure uninterrupted shooting during camping activities​

To charge action cameras to record the dynamic activities such as hiking and rock climbing during camping