1,200 lumens. 112g. Works at -40°C and 10,000m. ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌

Words I like: Gear doesn't fail in your living room. It fails at 4,000m, at 3am, when you can't fix it. Hey ! Most hikers think their headlamp is rated for 8 hours. It is. At 25°C in a lab. At -20°C, a standard lithium-ion battery loses 40-60% capacity. Your 8-hour headlamp becomes a 3-hour headlamp. At -30°C, maybe 90 minutes. At -40°C, most batteries just stop. That's why every mountaineering packing list says the same thing: sleep with your batteries in your sleeping bag, carry spares in your jacket, bring a backup headlamp. Think about what that advice actually means. It means the gear wasn't built for where you're taking it and you're expected to babysit it the whole way up.
The HA29 UHE uses a 2,500mAh battery rated to -40°C. For context, Petzl says their batteries start degrading at -5°C. Black Diamond rates theirs to -17°C. The HA29 holds roughly 75% capacity at temperatures where most headlamps are already dead. 1,200 lumens. 112g. Three colour temperatures so fog doesn't turn your beam into a white wall. IPX8 submersible (the entire Petzl lineup is IPX4 splash-resistant). Takes 3x AAA as backup from any village shop on the trail. The math: a guided Annapurna or Kinabalu trek runs $1,200-$2,000 SGD. T he summit night is the whole reason you went. The HA29 UHE is $119, and it was actually tested for where you're going. If you climb above treeline after dark: https://nitecore.sg/products/ha29-uhe-black-1200-lumens Code NC10 for 10% off. 60-day money-back guarantee. As promised, value in under a minute. Sincerely, Ming Jie Nitecore Singapore P.S. My headlamp battery at -20°C on a summit push.

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