{"product_id":"nitecore-u12-dual-slot-usb-li-ion-battery-charger","title":"Nitecore UI2 – Dual-Slot Portable USB Li-ion Battery Charger for 18650, 21700, 20700 \u0026 18350","description":"\u003ch2\u003eNitecore UI2 – Dual-Slot Portable USB Li-ion Battery Charger\u003c\/h2\u003e\n\u003cp\u003ePowerful and compact, the Nitecore UI2 is a dual-slot portable USB lithium-ion battery charger that reaches a maximum charging current of 800mA per slot and accepts 18650, 18350, 20700, 21700 and dozens of other Li-ion and IMR cell sizes. Two independent bays mean you can top off a pair of 18650s at once. At 2.8 oz and 4.94\" long, the Nitecore UI2 still fits in the palm of your hand.\u003c\/p\u003e\n\u003cp\u003eIts USB input works with wall adapters, power banks, solar panels and car chargers, making the Nitecore UI2 a practical field charger for camping, overlanding and emergency kits as well as a compact everyday charger for 18650 flashlight users.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDual-slot portable USB Li-ion battery charger\u003c\/li\u003e\n\u003cli\u003eMaximum charging current of 800mA per slot\u003c\/li\u003e\n\u003cli\u003eIntelligent charging mode selection (constant current and constant voltage)\u003c\/li\u003e\n\u003cli\u003ePower indicator shows real-time battery level and charging status\u003c\/li\u003e\n\u003cli\u003eSafeguards against reverse polarity, overcharging and overheating\u003c\/li\u003e\n\u003cli\u003eCharges large-format cells including 20700 and 21700\u003c\/li\u003e\n\u003cli\u003eLightweight and portable for outdoor charging\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNitecore UI2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSlots\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 5V\/2A 10W (USB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4.2V ±1%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e800mA x 2 (max)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible With\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLi-ion \/ IMR: 10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14430, 14500, 14650, 16340 (RCR123), 16500, 16650, 17350, 17500, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 21700, 22500, 22650, 25500, 26500, 26650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eL-4.94\" x W-2.34\" x H-1.26\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIn the Box\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 x Nitecore UI2 charger, 1 x USB charging cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat batteries does the Nitecore UI2 charge?\u003c\/h3\u003e\n\u003cp\u003eThe Nitecore UI2 charges rechargeable Li-ion and IMR cells including 18650, 21700, 20700, 18350, 16340 (RCR123), 14500, 26650 and more than two dozen other sizes. It is a Li-ion charger only — do not use the Nitecore UI2 with NiMH or alkaline batteries.\u003c\/p\u003e\n\n\u003ch3\u003eCan the Nitecore UI2 charge two batteries at the same time?\u003c\/h3\u003e\n\u003cp\u003eYes. The Nitecore UI2 has two independent charging bays, each delivering up to 800mA, so a pair of 18650 cells charges simultaneously at full current rather than sharing one supply.\u003c\/p\u003e\n\n\u003ch3\u003eHow fast does the Nitecore UI2 charge?\u003c\/h3\u003e\n\u003cp\u003eEach slot on the Nitecore UI2 delivers up to 800mA at 4.2V ±1%. On a 3400mAh 18650 that is roughly four to five hours from empty, with the charger switching automatically between constant-current and constant-voltage modes.\u003c\/p\u003e\n\n\u003ch3\u003eIs the Nitecore UI2 safe to leave charging?\u003c\/h3\u003e\n\u003cp\u003eYes. The Nitecore UI2 protects against reverse polarity, overcharging and overheating and terminates the charge automatically when each cell is full. As with any lithium charger, use it on a hard non-flammable surface.\u003c\/p\u003e\n\n\u003ch3\u003eCan you power the Nitecore UI2 from a power bank or solar panel?\u003c\/h3\u003e\n\u003cp\u003eYes. The Nitecore UI2 draws DC 5V\/2A over USB, so it runs from a power bank, solar panel, car adapter, laptop port or wall adapter — which is what makes the Nitecore UI2 useful for camping, travel and emergency kits.\u003c\/p\u003e\n\n\u003ch3\u003eHow big is the Nitecore UI2?\u003c\/h3\u003e\n\u003cp\u003eThe Nitecore UI2 measures L-4.94\" x W-2.34\" x H-1.26\" and weighs 2.8 oz — a little wider than the single-slot Nitecore UI1 to make room for the second bay, but still pocketable.\u003c\/p\u003e\n\n\u003ch3\u003eWhere can I buy the Nitecore UI2?\u003c\/h3\u003e\n\u003cp\u003eYou can buy the Nitecore UI2 dual-slot USB Li-ion battery charger here at Going Gear, an authorized Nitecore dealer, so you receive genuine Nitecore stock backed by the manufacturer's warranty.\u003c\/p\u003e","brand":"Nitecore","offers":[{"title":"Default Title","offer_id":53025282785600,"sku":"NIT-U12","price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0807\/8953\/7088\/files\/CHG-NITE-UI2-2T.jpg?v=1786821210","url":"https:\/\/goinglights.com\/products\/nitecore-u12-dual-slot-usb-li-ion-battery-charger","provider":"Going Lights","version":"1.0","type":"link"}