{"product_id":"xtar-mc1-single-slot-usb-c-li-ion-battery-charger-1a-fast-charging-0v-activation-portable-design-for-18650-21700-more","title":"XTAR MC1 Single-Slot USB-C Li-ion Battery Charger – 1A Fast Charging, 0V Activation \u0026 Portable Design for 18650, 21700 \u0026 More","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"5:1-5:12;112-123\"\u003eOverview\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"7:1-7:345;125-469\"\u003eThe XTAR MC1 is a single-slot Type-C charger built for portability — small enough to keep in a bag, a car, or a desk drawer as a genuinely useful backup, not just a compact afterthought. It charges one Li-ion cell at a full 1A with proper 3-stage charging, and includes the same \"0V activation\" recovery feature found on XTAR's larger chargers.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"9:1-9:214;471-684\"\u003eIt's a good fit for anyone who wants a dependable single-cell charger without the bulk of a multi-slot unit — or as a companion to a larger charger when you need to top off one extra cell alongside a bigger batch.\u003c\/p\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"11:1-11:14;686-699\"\u003eFull Specs\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"13:1-30:61;701-1809\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eParameter\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMC1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eInput\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eType-C, 5V⎓1A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharging Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e1A (single slot, constant current)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharging Method\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3-stage charging: trickle wake-up → constant current → constant voltage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cut-off Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.2V ±0.05V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cut-off Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e\u0026lt;130mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e0°C to 40°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDimensions\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eL103mm x W25mm x H30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNet Weight\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e27g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCompatible Chemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\/3.7V Li-ion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCompatible Cell Sizes\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e10440, 14500, 14650, 16340, 17335, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtected Cell Support\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eYes — supports protected 21700 cells\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSpecial Feature\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e\"0V\" activation technology for recovering some over-discharged cells\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStatus Indicator\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eGreen = standby or fully charged; Red = actively charging; Off\/unlit = reverse polarity or abnormal insertion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSafety Protections\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eIntelligent detection, automatic cut-off, overcurrent, overcharge, overvoltage, short-circuit, and reverse-polarity protection, soft-start\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePackage Includes\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMC1 charger, USB-C cable, user manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"32:1-32:34;1811-1844\"\u003eHow the Charging Process Works\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"34:1-34:100;1846-1945\"\u003eThe MC1 uses the same three-stage approach as XTAR's larger chargers, scaled down to a single slot:\u003c\/p\u003e\n\u003col class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-decimal flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"36:1-38:189;1947-2415\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"36:1-36:128;1947-2074\"\u003e\n\u003cstrong\u003eTrickle charge\u003c\/strong\u003e — a small preliminary current wakes up and tops off a low-voltage cell before ramping up to full current.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"37:1-37:152;2075-2226\"\u003e\n\u003cstrong\u003eConstant current\u003c\/strong\u003e — the charger holds a steady 1A while the cell's voltage climbs toward full — this is where most of the capacity gets restored.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"38:1-38:189;2227-2415\"\u003e\n\u003cstrong\u003eConstant voltage\u003c\/strong\u003e — as the cell approaches full charge, the charger holds voltage steady and gradually reduces current, topping off the last portion of capacity without overcharging.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"40:1-40:45;2417-2461\"\u003eWhat Makes This Charger Worth Considering\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"42:1-46:173;2463-3352\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:132;2463-2594\"\u003e\n\u003cstrong\u003eGenuinely pocket-sized\u003c\/strong\u003e — at 103mm x 25mm x 30mm and 27g, this is small enough to actually carry, not just \"compact\" on paper.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:160;2595-2754\"\u003e\n\u003cstrong\u003eFull 1A charging, no compromises for size\u003c\/strong\u003e — despite the small footprint, it doesn't cut corners on charge current the way some ultra-compact chargers do.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:150;2755-2904\"\u003e\n\u003cstrong\u003eType-C in, works anywhere\u003c\/strong\u003e — laptop, wall adapter, car charger, or power bank all work as a power source, so you're not tied to a specific plug.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:275;2905-3179\"\u003e\n\u003cstrong\u003e0V activation\u003c\/strong\u003e — most basic single-slot chargers simply refuse to recognize a cell drained too far below normal cutoff voltage. The MC1's activation function can attempt a slow, controlled recovery charge on some of these cells rather than writing them off immediately.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:173;3180-3352\"\u003e\n\u003cstrong\u003eBroad size compatibility\u003c\/strong\u003e — from small 10440s up through 26650s, plus protected 21700 cells, one charger covers most cylindrical Li-ion formats you're likely to carry.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"48:1-48:27;3354-3380\"\u003eWhere This Charger Fits\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"50:1-53:86;3382-3825\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"50:1-50:103;3382-3484\"\u003e\n\u003cstrong\u003eA backup or travel charger\u003c\/strong\u003e — small enough to throw in a bag or glovebox without a second thought\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"51:1-51:149;3485-3633\"\u003e\n\u003cstrong\u003eRounding out odd-numbered battery purchases\u003c\/strong\u003e — pairing with a 4-slot charger to cover a 5th or 6th cell without needing a second full-size unit\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"52:1-52:106;3634-3739\"\u003e\n\u003cstrong\u003eAnyone who only needs to charge one cell at a time\u003c\/strong\u003e and doesn't want to pay for slots they won't use\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"53:1-53:86;3740-3825\"\u003e\n\u003cstrong\u003eA first charger for someone new to 18650s\u003c\/strong\u003e — simple, safe, and hard to get wrong\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"55:1-55:24;3827-3850\"\u003eWhat to Keep in Mind\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"57:1-59:74;3852-4385\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"57:1-57:208;3852-4059\"\u003e\n\u003cstrong\u003eThis is a single-slot charger.\u003c\/strong\u003e If you regularly need to charge multiple cells at once, pair it with a larger charger (like the MC4S or VC4SL) rather than expecting it to cover bulk charging on its own.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"58:1-58:252;4060-4311\"\u003e\n\u003cstrong\u003eCharging handles voltage\/current safety, not discharge-side protection.\u003c\/strong\u003e If you're using unprotected cells in a device, that device still needs its own low-voltage cutoff — the charger's protections don't extend to how the cell is used afterward.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"59:1-59:74;4312-4385\"\u003e\n\u003cstrong\u003eStay within the 0-40°C operating range\u003c\/strong\u003e for safe, reliable charging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"61:1-61:30;4387-4416\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"63:1-64:170;4418-4640\"\u003e\u003cstrong\u003eHow long does it take to charge a typical 18650?\u003c\/strong\u003e At a full 1A, a 2,500-3,000mAh 18650 typically reaches full charge in roughly 3-4 hours, depending on the cell's starting charge level and its own charge current rating.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"66:1-67:156;4642-4845\"\u003e\u003cstrong\u003eCan I use any USB-C cable and power source?\u003c\/strong\u003e Yes — the MC1 accepts standard Type-C input from laptops, wall adapters, car chargers, or power banks. Just make sure the source can supply at least 5V\/1A.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"69:1-70:164;4847-5068\"\u003e\u003cstrong\u003eWhat does it mean if the LED doesn't light up at all?\u003c\/strong\u003e That typically indicates a reverse-polarity insertion or another abnormal condition the charger has detected. Remove the cell, check its orientation, and reinsert.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"72:1-73:173;5070-5280\"\u003e\u003cstrong\u003eDoes this charge protected cells?\u003c\/strong\u003e Yes, it supports protected 21700 cells. For other protected sizes, check the cell's own length — protection circuits add length that may not fit every charger's slot depth.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"75:1-76:234;5282-5588\"\u003e\u003cstrong\u003eIs the \"0V activation\" feature something I should rely on regularly?\u003c\/strong\u003e It's meant as an occasional recovery option for over-discharged cells, not a routine part of normal use. A cell that repeatedly needs 0V activation is showing signs of wear or misuse and is worth watching more closely — or replacing.\u003c\/p\u003e","brand":"XTAR","offers":[{"title":"Default Title","offer_id":51454221123830,"sku":"OAS1343","price":18.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-mc1-main-hero-single-charger_ad161cd8-1dde-44d1-8855-09f08c155bc3.webp?v=1786968488","url":"https:\/\/oneandes.com\/products\/xtar-mc1-single-slot-usb-c-li-ion-battery-charger-1a-fast-charging-0v-activation-portable-design-for-18650-21700-more","provider":"OneAndes","version":"1.0","type":"link"}