While they generate less waste over their lifespan and can top up from any USB port, rechargeable headlamps have one downside: They tend to drain faster and shine less brightly than their alkaline equivalents. BioLite’s new model bucks the trend; it’s bright enough for almost anything you might need to do in camp, and can last for a whopping 150 hours on low. At its brightest setting, it can put out a constant 500 lumens for two hours—long enough for our tester to bust out a 4-mile run through the pitch-black desert near Scottsdale, Arizona. (Need to quickly scout a path? It can push out a blinding 750 lumens in 30-second bursts.) For all that power, the HeadLamp 750 is still comfy to wear, thanks to a slim, rectangular body and a sweat-wicking headband, and it has a red light mode and rear red light. “I’ve run in lighter-weight headlamps, but the way the slim, form-fitting battery pack sits didn’t feel heavy,” our tester says. (Another reports it slipped a bit during vigorous activity.) Caveat: price.