Warm-house Dual Channel Battery Charger Universal Auto off Intelligent Battery Charger for 18650/18500/14500/26650 AA Lithium Battery Lifepo4 Battery USA Plug Black Dual-Slot intelligent chargerPerfect support for various types of rechargeable batteries, such as 18650/18500/14500/26650/16340 LED indication.Indicator light : Red flashing (charging )--Green (finish charge) . Automatic identification and transformation, for all sorts of all kinds of 3.0/3.2/3.6/3.7 V lithium ion batteries, lithium iron phosphate batteries charging,filled automatically stops charging. When the battery in the wrong place comprehensive protection, short circuit not charging, eliminating the common problem of unsafe battery charge