Protected 18650 batteries for XHDATA D-368

I bought a couple of XHDATA D-368 handheld radios for extended family, in case&#xA;we need to go to hide in a shelter again. Turns out, old-style radios are fun&#xA;to play not in an emergency, especially for kids! &#xA; Out of the box it comes with a 3.8V 2Ah unprotected li-on cell: &#xA;&#xA;&#xA;&#xA;&#xA;&#xA;&#xA;&#xA;&#xA;&#xA;&#xA;&#xA;&#xA;&#xA;&#xA;&#xA;&#xA;&#xA;&#xA;&#xA;&#xA;&#xA;…