This video reviews the Quark Mini AA flashlight, highlighting its potential for enhanced performance when using a 14500 rechargeable lithium-ion battery, which can push output to around 260 lumens. The reviewer notes that this is an unapproved upgrade by the manufacturer (4Sevens) and will void the warranty due to potential overheating. Despite this, the reviewer finds the light handles the increased output well, especially in cold weather, and withstands harsh drop tests and is waterproof. The video also mentions PWM hum at lower brightness levels and the excellent XP-G LED emitter. The reviewer considers it a cheap and lightweight way to transform the Mini AA into a "finger-sized searchlight" and gives it a high rating.
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