(Google Translate from French) The phone uses an ESP32 at its core, with a SIM800L GSM modem to interact with the cell network, including retrieving the system time. A small battery is included as ...

An curved arrow pointing right. Researchers at the University of Washington have created a cell phone that uses so little power, it never needs to charge and doesn't have a battery. Instead, it ...

They’re generally stored in hermetically-sealed packs with a dessicant for good measure. When needed, the pack can be opened, and the battery juiced up, and it’s ready to go. They’ll run as ...