{"product_id":"samsung-inr18650-20r-v4-2000mah-20a-button-top-battery-4-pack-with-xtar-mc4-charger-extreme-high-drain-power-kit-for-high-wattage-vapes-tactical-flashlights-rc-hobbies","title":"Samsung 20R (V4) 2000mAh 20A Button Top Battery 4-Pack with XTAR MC4S Charger – High-Drain Power Kit for Tactical Lights \u0026 High-Output Tools","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"5:1-5:25;163-187\"\u003eWhat's in This Bundle\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=\"7:1-9:57;189-337\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"7:1-7:55;189-243\"\u003e4x Samsung INR18650-20R4, 2,000mAh (max), Button Top\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"8:1-8:37;244-280\"\u003e1x XTAR MC4S 4-slot Type-C charger\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"9:1-9:57;281-337\"\u003eUSB-A to USB-C charging cable and user manual included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"11:1-11:165;339-503\"\u003eA complete kit for anyone running a 4-cell high-drain device or building a small pack — four matched cells paired with a compact, genuinely portable 4-slot charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"13:1-13:572;505-1076\"\u003e\u003cstrong\u003eA note on \"20R4\":\u003c\/strong\u003e this is a distinct cell revision, not simply a batch label for the standard INR18650-20R. Based on the lab-test data available for this specific cell, it differs from the standard 20R in a couple of measurable ways — most notably a 20A max continuous discharge rating (versus 22A on the standard 20R) and a tighter internal resistance spec. We've sourced these numbers from supplier lab testing rather than a publicly available Samsung SDI datasheet. If you have a manufacturer spec sheet that differs from what's below, let us know before ordering.\u003c\/p\u003e\n\u003cp data-sourcepos=\"13:1-13:628;492-1119\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eThis listing is for Button Top. Looking for Flat Top? \u003ca href=\"https:\/\/oneandes.com\/product\/samsung-inr18650-20r-v4-2000mah-20a-flat-top-battery-4-pack-with-xtar-mc4-charger-high-output-power-bundle-for-high-power-tools-drones-custom-battery-packs\/\"\u003eClick here to buy: Samsung 20R4 Flat Top + MC4S Bundle.\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"15:1-15:32;1078-1109\"\u003eWhy This Pairing Makes Sense\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"17:1-17:518;1111-1628\"\u003eLike the standard 20R, this is a lower-capacity, high-current cell suited to power tool packs, e-bike builds, and other applications where sustained current draw matters more than runtime per cell. Buying four cells together as a matched set means consistent capacity and internal resistance across the group — this matters more, not less, for a high-drain cell, since mismatched cells in a pack show up faster under heavy load. Button Top is the terminal type required by devices with spring-loaded battery contacts.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"19:1-19:299;1630-1928\"\u003eThe XTAR MC4S is a genuine step up from the older Micro-USB MC4 — same compact footprint, but with a Type-C port (so you can charge from a laptop, wall adapter, or car charger without hunting for a specific cable) and mixed-chemistry support for Li-ion alongside Ni-MH\/Ni-Cd cells in the same unit.\u003c\/p\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"21:1-21:41;1930-1970\"\u003eSamsung INR18650-20R4 — Battery Specs\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"23:1-35:49;1972-2389\"\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\"\u003eBrand \u0026amp; Model\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSamsung INR18650-20R4\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\"\u003eMax Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2,000mAh\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\"\u003eMin Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e1,900mAh\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\"\u003eRated Voltage\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\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\"\u003eMax Charge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4A \/ 4.2V\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\"\u003eMax Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e20A \/ 2.5V cutoff\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\"\u003eInternal Resistance\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e14mΩ ±3 (lab-tested)\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\"\u003e~44g\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\"\u003eCell Dimensions\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eHeight 65mm, Diameter 18mm\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\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eButton Top\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\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"37:1-37:365;2391-2755\"\u003e\u003cstrong\u003eHow this compares to the standard Samsung 20R:\u003c\/strong\u003e capacity is essentially the same (2,000mAh), and the max charge current matches (4A). The two measurable differences are discharge rating (20A here versus 22A on the standard 20R) and internal resistance, where this batch's lab-tested figure (14mΩ) runs lower than what's typically measured on standard 20R cells.\u003c\/p\u003e\n\u003cp data-sourcepos=\"37:1-37:365;2450-2814\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eThis listing is for Button Top. For Flat Top\u003ca href=\"https:\/\/oneandes.com\/product\/samsung-inr18650-20r-v4-2000mah-20a-flat-top-battery-4-pack-with-xtar-mc4-charger-high-output-power-bundle-for-high-power-tools-drones-custom-battery-packs\/\"\u003e click here\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"39:1-39:29;2757-2785\"\u003eXTAR MC4S — Charger Specs\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"41:1-55:78;2787-4189\"\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\"\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, DC 5V⎓2.1A\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×2 or 0.5A×4 — current per slot depends on how many slots are in use\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\"\u003eTC-CC-CV 3-stage for Li-ion (trickle → constant current → constant voltage); precise 0ΔV\/-ΔV full-charge detection for Ni-MH\/Ni-Cd\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\"\u003eCut-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\"\u003e4.20V ±0.05V (Li-ion) \/ 1.5V (Ni-MH\/Ni-Cd)\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\"\u003eCut-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≤70mA\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\"\u003eL100mm x W97mm x H26.5mm\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\"\u003e95g\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\"\u003e3.6V\/3.7V Li-ion\/IMR\/INR\/ICR: 10440, 14500, 14650, 16340, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650 (CH1 \u0026amp; CH4 fit the full range including 26650; CH2 \u0026amp; CH3 fit up to 21700). 1.2V Ni-MH\/Ni-Cd: AAAA, AAA, AA, A, SC, 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\"\u003eNotes\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCan fit two 26650 cells (outer slots 1 \u0026amp; 4) and two unprotected 21700 cells (inner slots 2 \u0026amp; 3) at once; cannot charge protected 20700\/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\"\u003eExtra 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\" — can recover some over-discharged cells; automatically detects battery chemistry and switches charging strategy for mixed Li-ion\/Ni-MH\/Ni-Cd charging\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\"\u003eLED Indicators\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eRed = charging\/activating\/slot short-circuit; Green = fully charged, no battery inserted, or poor contact; Red+Green flashing = reverse polarity (reinsert correctly)\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\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eOvercurrent, overvoltage, overheat, and short-circuit protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"57:1-57:369;4191-4559\"\u003e\u003cstrong\u003eA realistic note on charge time:\u003c\/strong\u003e with all four bays occupied, the MC4S delivers 0.5A per slot — expect a full charge in roughly 4.5-5 hours for all four cells at once. That's not the fastest option in our lineup, but it's a genuinely portable, Type-C-powered charger you can run from a laptop, wall adapter, or car charger without carrying a dedicated power brick.\u003c\/p\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"59:1-59:24;4561-4584\"\u003eWhere This Cell 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=\"61:1-63:144;4586-4915\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"61:1-61:99;4586-4684\"\u003e\n\u003cstrong\u003ePower tool battery packs\u003c\/strong\u003e — cordless drills, saws, and similar tools that draw hard and often\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"62:1-62:87;4685-4771\"\u003e\n\u003cstrong\u003eE-bike and e-scooter packs\u003c\/strong\u003e — commonly used in multi-cell parallel configurations\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"63:1-63:144;4772-4915\"\u003e\n\u003cstrong\u003eDIY packs prioritizing current over runtime\u003c\/strong\u003e, especially builds where consistent internal resistance across cells matters for pack balance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"65:1-65:173;4917-5089\"\u003eNot the right choice if you want strong runtime from a small number of cells, or if you need the slightly higher 22A ceiling of the standard 20R for a specific application.\u003c\/p\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"67:1-67:48;5091-5138\"\u003eThings Worth Knowing Before You Use This Kit\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=\"69:1-71:125;5140-5641\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"69:1-69:158;5140-5297\"\u003e\n\u003cstrong\u003eThis is an unprotected cell.\u003c\/strong\u003e The charger enforces its own voltage and current cutoffs, but your device still needs to handle discharge-side protection.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"70:1-70:219;5298-5516\"\u003e\n\u003cstrong\u003eDon't mix these with standard 20R cells or older 20R4 batches in the same pack.\u003c\/strong\u003e Even with similar specs, small differences in internal resistance or capacity between cells can cause imbalanced charging over time.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"71:1-71:125;5517-5641\"\u003e\n\u003cstrong\u003eThis is a lower-capacity cell by design\u003c\/strong\u003e, whether standard 20R or 20R4 — don't expect 25R or 30Q-level runtime from it.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"73:1-73:30;5643-5672\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"75:1-76:289;5674-6035\"\u003e\u003cstrong\u003eWhat's actually different between this and the standard Samsung 20R?\u003c\/strong\u003e Based on the lab data we have for this batch, capacity and max charge current are essentially the same. The measurable differences are a slightly lower max continuous discharge rating (20A vs. 22A) and a tighter, lower internal resistance spec (14mΩ vs. the standard 20R's typical range).\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"78:1-79:267;6037-6353\"\u003e\u003cstrong\u003eHow is the MC4S different from the older MC4?\u003c\/strong\u003e Same compact size and the same 1A×2\/0.5A×4 charging current, but the MC4S uses a Type-C port instead of Micro-USB, and it can also charge Ni-MH\/Ni-Cd cells (AA, AAA, etc.) with automatic chemistry detection — the older MC4 doesn't offer that mixed-chemistry support.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"81:1-82:210;6355-6615\"\u003e\u003cstrong\u003eCan I charge two different cell sizes at once?\u003c\/strong\u003e Yes, within limits — the outer two slots (1 \u0026amp; 4) fit larger cells up to 26650, while the inner two (2 \u0026amp; 3) handle sizes up to unprotected 21700. Protected 20700\/21700 cells won't fit or charge on this charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"84:1-85:185;6617-6844\"\u003e\u003cstrong\u003eIs this kit protected-cell compatible?\u003c\/strong\u003e No — the MC4S cannot charge protected 20700\/21700 cells. The cells included in this bundle are unprotected bare cells, which is standard for this model and compatible with the charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"87:1-88:249;6846-7140\"\u003e\u003cstrong\u003eWhat does the \"0V activation\" feature do?\u003c\/strong\u003e It lets the charger attempt a slow, controlled charge on cells drained deep enough that a standard charger would refuse to recognize them at all. It won't save every over-discharged cell, but it can recover some that would otherwise be written off.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"92:1-92:219;7147-7365\"\u003e\u003cstrong\u003eIn stock now.\u003c\/strong\u003e This bundle ships as a matched set of four Samsung INR18650-20R4 Button Top cells with a genuine XTAR MC4S charger — compact, Type-C powered, and ready for power tool and e-bike builds out of the box.\u003c\/p\u003e","brand":"Samsung","offers":[{"title":"Default Title","offer_id":51454217519350,"sku":"OAS1651","price":45.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/samsung-20r-button-4pack-mc4s-hero_efd633bd-b9be-460e-8168-26a8df7d007d.webp?v=1786968372","url":"https:\/\/oneandes.com\/products\/samsung-inr18650-20r-v4-2000mah-20a-button-top-battery-4-pack-with-xtar-mc4-charger-extreme-high-drain-power-kit-for-high-wattage-vapes-tactical-flashlights-rc-hobbies","provider":"OneAndes","version":"1.0","type":"link"}