2*D battery (not included) is essential in case of power outages .Note:To avoid the radio or batteries to be burnt out, please take the D-cell batteries out while charging with the rechargeable ...

The radio is a clone of a German project and provides a low-power radio with a rechargeable battery. You can see his video about the gear below. SSB is an odd choice for low power operation ...

Researchers at the University of Washington have created a cell phone that ... charge and doesn't have a battery. Instead, it pulls power from ambient light and radio waves. Follow Tech Insider ...

Cell towers have a hard ... the Heltec radio comes with Wi-Fi, Bluetooth, and a LoRa antenna. Two things it doesn’t have are ...

A radio-frequency field is applied to a sample ... "What we did in our study was like taking MRIs of operating battery cells, except that we didn't produce images of the cells," study main author ...