A pair of these 'walkie talkies' with charging base.
We bought them some 13 years ago when we got our motorhome thinking they would be cheaper than using mobile phones on sites. In the end mobile phone charges dropped so we have never used them although always had them with us.
They have charged and show 100% on the display but I have no idea how long the batteries might last. They do work, we tested them around the house. Manuals are easily available online.
Binatone Terrain 750 Walkie Talkies (Easington OX16)
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