This rugged solar flashlight uses the sun to power up the rechargeable AA batteries inside, plus it has a hook allowing it to double as a light source at night. There’s a “pay it forward” bonus too: when you buy one of these, the company sends a second one to a school in Nigeria for free.
This is a hefty flashlight with ample panels to catch the sun, so it is a lot brighter than most solar ones and it has a larger charging area. A full day of charging will routinely take you through the night, for six or eight hours of light. For normal intermittent use, you could probably go weeks between charges.
When the rechargeable AA batteries eventually die (after 750 to 1,000 hours), you can switch them out with a new set of standard rechargeable batteries that are widely available. The BoGo comes in bright pink or bright orange, so you probably won’t lose it.