The Ledlenser ML4 is an ultra-compact outdoor lantern, less than 10 cm long and about 71 g, that gives soft, glare-free warm light for a tent, campervan, shed, attic or as a power-cut light at home. Micro-prism lens technology spreads the light of nine LEDs evenly and efficiently, with up to 300 lumens in boost mode and a low setting that runs for up to 40 hours. There are five light functions, including a red light that preserves night vision. The lantern runs on its included rechargeable lithium-ion battery (750 mAh), which charges through a magnetic charging cable, and with Dual Power technology it can also run on a standard AA alkaline battery when there is no way to recharge. A carabiner snap hook lets you clip it to a backpack, hang it from a tent loop or a branch. It is rated IP66 against dust and water jets and is drop tested to 2 m.