You are looking at the current champion in the ongoing best yachting flashlight contest.
Our first reaction when we unpacked this was, “Junk.” It is a fraction of the weight of the “tactical” style lights we have had in the past. Happily, we decided to test it before sending it back. It is exceptionally bright. The low weight and handle make it much easier to grip and aim. And the battery really does work. The spec page says five hours, we have tested it to four, and can verify that after four hours this light is still very bright.
The Odear rechargeable shown above is our current best buy. At US $37.88 from Amazon (Amazon link) the Odear provides a lot of bang for the buck.
We now have three. One for land use, and two for Cochise. We will order one of their headlamps to test in the dinghy.