Fenix ARB-LP21 Power Extender

I was skeptical about the detachable battery pack, but once I plugged it into my headlamp, the added runtime felt almost endless. The integrated 5000mAh cell charges up surprisingly fast and gives me a solid backup when I'm out on longer night hikes.

The 5000mAh cell in this thing is a lifesaver on long night hikes—I ran my headlamp for three full evenings without touching my main charger. It feels solid in the hand, and the fact that it doubles as a standalone power bank means I’m carrying one less brick in my pack.

The usb-c port made charging this thing a breeze between trail runs, and the 5000mAh cell kept my headlamp going through a full night without dipping once. It's heavy enough that I notice it on the strap, but that's a fair trade for never being left in the dark.