{"product_id":"xtar-vc8s-charger-8x-samsung-25r-flat-top-18650-battery-kit","title":"XTAR VC8S Charger \u0026 8x Samsung 25R Flat Top 18650 Battery Kit","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;160-178\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:383;180-562\"\u003eHigh-drain batteries deserve a charger that can actually keep up with them. Overcharging, swelling, and no way to check cell health are the most common risks with mismatched charging setups. This bundle pairs genuine Samsung 25R Flat Top cells with the XTAR VC8S smart charger, so you get a matched, ready-to-use setup right out of the box — no guesswork on compatibility or safety.\u003c\/p\u003e\n\u003cp data-sourcepos=\"8:1-8:383;180-562\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eThis listing is for Flat Top. Looking for Button Top? \u003ca href=\"https:\/\/oneandes.com\/product\/xtar-vc8s-charger-8x-samsung-25r-button-top-18650-battery-kit\/\"\u003eClick here to buy: Samsung INR18650-25R Button Top + XTAR VC8S Bundle.\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:50;569-618\"\u003eSamsung INR18650-25R (Flat Top) Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-24:127;620-1155\"\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\"\u003eItem\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\"\u003eSpec\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\"\u003eSamsung INR18650-25R (Flat 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\"\u003eRated Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2500mAh\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\"\u003eNominal 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 Continuous 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\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 Cutoff 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\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\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNMC (Lithium Nickel Manganese Cobalt Oxide)\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 Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e18650 (approx. Φ18.3mm × 65.0mm)\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\"\u003eFlat Top — level positive terminal, suited for devices requiring full-surface contact\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\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eBattery packs, power banks, flashlights, power tools, e-bikes, and other devices designed for flat-top cells\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=\"26:1-26:201;1157-1357\"\u003e\u003cem\u003eNote: High-drain cells demand careful handling — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"30:1-30:26;1364-1389\"\u003eThe Charger: XTAR VC8S\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=\"32:1-38:97;1391-2135\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"32:1-32:66;1391-1456\"\u003e\n\u003cstrong\u003e8-bay Type-C LCD display\u003c\/strong\u003e with independent charging channels\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"33:1-33:152;1457-1608\"\u003e\n\u003cstrong\u003eTrue Capacity Test (Grad.)\u003c\/strong\u003e: charge–discharge–charge low-current analysis reveals the real capacity of each 25R cell, flagging degraded ones early\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"34:1-34:133;1609-1741\"\u003e\n\u003cstrong\u003eInternal Resistance Test (IR)\u003c\/strong\u003e: checks the health of every cell so you can pick out the best-performing ones for high-drain use\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"35:1-35:104;1742-1845\"\u003e\n\u003cstrong\u003eSmart Recognition + Trickle-CC-CV\u003c\/strong\u003e: automatically applies the optimal charging curve for 25R cells\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"36:1-36:84;1846-1929\"\u003e\n\u003cstrong\u003ePD Fast Charging\u003c\/strong\u003e: Type-C input, up to 3A on 2 bays with a 15V\/3A power source\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"37:1-37:109;1930-2038\"\u003e\n\u003cstrong\u003eReverse-Polarity Protection + Over-Discharge Repair\u003c\/strong\u003e: dual safety features that extend battery lifespan\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"38:1-38:97;2039-2135\"\u003e\n\u003cstrong\u003e5 Adjustable Current Levels\u003c\/strong\u003e: 3A \/ 2A \/ 1A \/ 0.5A \/ 0.25A to match different charging needs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"42:1-42:52;2142-2193\"\u003eVC8S Charger – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"44:1-44:39;2195-2233\"\u003e\u003cstrong\u003eCompatible battery length: 30–80mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"46:1-48:65;2235-2505\"\u003e\u003cstrong\u003e3.6V\/3.7V Li-ion\/IMR\/INR\/ICR batteries:\u003c\/strong\u003e 10440, 14500, 14650, 16340, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650 — including the Samsung 25R (18650) in this bundle \u003cem\u003e(Charges batteries with or without a protection circuit board)\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"50:1-52:66;2507-2615\"\u003e\u003cstrong\u003e1.2V NiMH batteries:\u003c\/strong\u003e AAA, AA, A, SC, C \u003cem\u003e(Note: Not compatible with 1.5V rechargeable lithium batteries)\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"54:1-54:66;2617-2682\"\u003e\u003cstrong\u003eCharge cutoff voltage:\u003c\/strong\u003e 4.20±0.05V (Li-ion) \/ 1.45±0.1V (NiMH)\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"58:1-58:23;2689-2711\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"60:1-60:276;2713-2988\"\u003eThe VC8S uses a spring-loaded contact design, so Flat Top batteries seat securely without any adapter — the springs take up the extra length automatically. Samsung 25R Flat Top cells measure about 65.0mm, which sits comfortably within the VC8S's 30–80mm battery length range.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"64:1-64:19;2995-3013\"\u003eWhat's Included\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=\"66:1-70:36;3015-3172\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"66:1-66:44;3015-3058\"\u003eSamsung INR18650-25R Flat Top Battery × 8\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"67:1-67:24;3059-3082\"\u003eXTAR VC8S Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"68:1-68:18;3083-3100\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"69:1-69:36;3101-3136\"\u003eUSB-C to USB-C Charging Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"70:1-70:36;3137-3172\"\u003eUSB-A to USB-C Charging Cable × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003eThis listing is for Flat Top. For Button Top\u003ca href=\"https:\/\/oneandes.com\/product\/xtar-vc8s-charger-8x-samsung-25r-button-top-18650-battery-kit\/\"\u003e click here\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"74:1-74:15;3179-3193\"\u003eSafety Tips\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=\"76:1-80:187;3195-3765\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"76:1-76:105;3195-3299\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"77:1-77:63;3300-3362\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"78:1-78:84;3363-3446\"\u003eRun a capacity test on the VC8S before first use to confirm each cell's condition\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"79:1-79:132;3447-3578\"\u003eThese are high-drain cells intended for compatible, purpose-built devices — do not use them in unauthorized or modified equipment\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:187;3579-3765\"\u003eFlat Top batteries are commonly used in devices with spring or flat-contact battery holders (e.g., battery packs and power tools) — check your device's terminal requirements before use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"84:1-84:7;3772-3778\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"86:1-87:154;3780-4004\"\u003e\u003cstrong\u003eQ: Can the XTAR VC8S charge Samsung 25R Flat Top batteries safely?\u003c\/strong\u003e A: Yes. The VC8S automatically recognizes Li-ion chemistry and applies a Trickle-CC-CV charging profile matched to 25R cells, with a 4.2V cutoff voltage.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"89:1-90:195;4006-4272\"\u003e\u003cstrong\u003eQ: What's the difference between Flat Top and Button Top batteries?\u003c\/strong\u003e A: The only difference is the shape of the positive terminal — Flat Top is level for full-surface contact, while Button Top has a raised nub. Capacity, voltage, and discharge rate are identical.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"92:1-93:142;4274-4486\"\u003e\u003cstrong\u003eQ: Will Flat Top batteries sit properly in the VC8S charger slots?\u003c\/strong\u003e A: Yes. The VC8S's spring-loaded contacts are designed to accommodate both Flat Top and Button Top cells without any adapter or modification.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"95:1-96:172;4488-4732\"\u003e\u003cstrong\u003eQ: How many 25R batteries can I charge on the VC8S at the same time?\u003c\/strong\u003e A: All 8 bays can charge simultaneously. For faster charging (3A or 2A), fewer bays are used at once — see the current level table in the VC8S charger listing for details.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"98:1-99:207;4734-4991\"\u003e\u003cstrong\u003eQ: How do I know if a 25R battery is degraded?\u003c\/strong\u003e A: Run the VC8S's Capacity Test (Grad.) mode. It performs a charge–discharge–charge cycle and displays the battery's true remaining capacity, making it easy to spot cells that have aged or lost performance.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"101:1-102:227;4993-5281\"\u003e\u003cstrong\u003eQ: Is 20A continuous discharge safe for everyday devices?\u003c\/strong\u003e A: These are high-drain cells built for devices that specifically call for high continuous discharge, such as certain power tools, flashlights, and DIY battery packs. Always check your device's battery requirements before use.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"104:1-105:134;5283-5442\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 8 Samsung INR18650-25R Flat Top batteries, 1 XTAR VC8S charger, a user manual, a USB-C to USB-C cable, and a USB-A to USB-C cable.\u003c\/p\u003e","brand":"Samsung","offers":[{"title":"Default Title","offer_id":51454222762230,"sku":"OAS1667","price":127.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-vc8s-samsung-25r-flat-top-8pack-kit-main_6c1b8113-ab55-4e54-ba73-71689f8247d0.webp?v=1786968545","url":"https:\/\/oneandes.com\/products\/xtar-vc8s-charger-8x-samsung-25r-flat-top-18650-battery-kit","provider":"OneAndes","version":"1.0","type":"link"}