I paid $19.99 several days ago (with a coupon that I found in this thread) for the Braun 390 lumens slim light. This is a bright, solidly built, and well designed unit. It uses replaceable 18650 Li-Ion, 2200mah batteries which you can purchase at specialty battery supply houses. In N.E. OH, I purchased an extra Samsung 18650 Li-Ion, 2500mah battery from Bulldog Battery in Willoughby, OH.
<a data-flickr-embed="true" href="https://www.flickr.com/photos/45102494@N02/39224473312/in/album-72157663937853068/" title="IMG_20171222_174642"><img src="https://farm5.staticflickr.com/4736/39224473312_88133d5d0a.jpg" width="358" height="500" alt="IMG_20171222_174642"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>
<a data-flickr-embed="true" href="https://www.flickr.com/photos/45102494@N02/39224474052/in/album-72157663937853068/" title="IMG_20171222_174726"><img src="https://farm5.staticflickr.com/4686/39224474052_11a86f38ff.jpg" width="500" height="375" alt="IMG_20171222_174726"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>
<a data-flickr-embed="true" href="https://www.flickr.com/photos/45102494@N02/39224473982/in/album-72157663937853068/" title="IMG_20171222_175629"><img src="https://farm5.staticflickr.com/4636/39224473982_23df8cf8fb.jpg" width="465" height="500" alt="IMG_20171222_175629"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>
<a data-flickr-embed="true" href="https://www.flickr.com/photos/45102494@N02/39224473122/in/album-72157663937853068/" title="IMG_20171222_175830"><img src="https://farm5.staticflickr.com/4686/39224473122_a828fe8483.jpg" width="487" height="500" alt="IMG_20171222_175830"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>
Dave