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2. These Are the Best Emergency Radios to Keep You Updated ...

   www.aol.com/best-emergency-radios-keep-updated...

   Like the other radios on this list, this is a portable, compact unit with high levels of weather resistance and durability. ... Power options include an AC adapter, a rechargeable battery, AAA ...

3. Midland Radio - Wikipedia

   en.wikipedia.org/wiki/Midland_Radio

   Midland Radio offers four lines of two-way radios: X-Talker, LXT, GXT and XT511; MicroMobile. High-Powered GMRS Radios that can communicate with any Midland Radio Two-Way Radio. Midland Radio is the official communication sponsor of Jeep Jamboree, which now is in a transition to switch from CB to MicroMobile Radios. [2] CB Radios

4. Rechargeable battery - Wikipedia

   en.wikipedia.org/wiki/Rechargeable_battery

   Several alternatives to rechargeable batteries exist or are under development. For uses such as portable radios, rechargeable batteries may be replaced by clockwork mechanisms which are wound up by hand, driving dynamos, although this system may be used to charge a battery rather than to operate the radio directly.

5. List of Sony Walkman products - Wikipedia

   en.wikipedia.org/wiki/List_of_Sony_Walkman_products

   It shipped with a white 64 MB MagicGate Memory Stick and built-in battery, selling it alongside the later NW-E3 (64 MB built-in and using two AAA batteries for 4 to 5 hours playback duration). The player could only play ATRAC formatted files, Sony's proprietary format, so was not technically an " MP3 player ".

6. Transistor radio - Wikipedia

   en.wikipedia.org/wiki/Transistor_radio

   The typical portable tube radio of the fifties was about the size and weight of a lunchbox and contained several heavy, non-rechargeable batteries—one or more so-called "A" batteries to heat the tube filaments and a large 45- to 90-volt "B" battery to power the signal circuits. By comparison, the transistor radio could fit in a pocket and ...

7. AN/PRC-77 Portable Transceiver - Wikipedia

   en.wikipedia.org/wiki/AN/PRC-77_Portable_Transceiver

   The AN/PRC-77 entered service in 1968 during the Vietnam War as an upgrade to the earlier AN/PRC-25.It differs from its predecessor mainly in that the PRC-77's final power amplifier stage is made with a transistor, eliminating the only vacuum tube in the PRC-25, as well as the DC-DC voltage converter used to create the high plate voltage for the tube from the 15 V battery.