{"product_id":"samsung-30q-3000mah-15a-flat-top-battery-4-pack-with-xtar-vc4sl-charger-high-drain-power-bundle-for-edc-flashlights-drones-cordless-tools","title":"Samsung 30Q 3000mAh 15A Flat Top Battery 4-Pack with XTAR VC4SL Charger – High-Drain Power Bundle for EDC Flashlights, Drones \u0026 Cordless Tools","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"5:1-5:25;142-166\"\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=\"7:1-9:91;168-344\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"7:1-7:45;168-212\"\u003e4x Samsung INR18650-30Q, 3000mAh, Flat Top\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"8:1-8:41;213-253\"\u003e1x XTAR VC4SL 4-slot LCD USB-C charger\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"9:1-9:91;254-344\"\u003e1x Type-C QC3.0 fast-charge cable, storage pouch, and manual (included with the charger)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"11:1-11:223;346-568\"\u003eA complete kit for anyone running a 4-cell device or building a small pack — four matched, genuine 30Q cells paired with a charger that does more than just charge: it tests, monitors, and reports on each cell individually.\u003c\/p\u003e\n\u003cp data-sourcepos=\"11:1-11:223;346-568\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eThis listing is for Flat Top. Looking for Button Top? \u003ca href=\"https:\/\/oneandes.com\/product\/samsung-30q-3000mah-15a-button-top-battery-4-pack-with-xtar-vc4sl-charger-high-drain-power-kit-for-vapes-tactical-flashlights-power-tools\/\"\u003eClick here to buy: Samsung 30Q Button Top + XTAR VC4SL 4 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=\"13:1-13:32;570-601\"\u003eWhy This Pairing Makes Sense\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"15:1-15:436;603-1038\"\u003eFour 30Qs bought together as a matched set means consistent capacity and internal resistance across the group — genuinely useful for anything running cells in series or parallel, where mismatched cells degrade pack performance faster than any single \"bad\" cell would on its own. Flat Top is the standard terminal type for most current devices — DIY packs, tool battery builds, and equipment that doesn't rely on spring-loaded contacts.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"17:1-17:482;1040-1521\"\u003eThe XTAR VC4SL is a real step up from a basic charger: it's got an LCD display showing live voltage, current, capacity, and internal resistance per slot, plus a capacity-test (grading) mode that charges, discharges, and recharges a cell to verify its actual capacity rather than just trusting the label. For a 4-cell purchase like this, that verification capability is genuinely useful — you can confirm all four cells are performing consistently before you commit them to a build.\u003c\/p\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"19:1-19:31;1523-1553\"\u003eSamsung 30Q — Battery Specs\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"21:1-31:30;1555-1912\"\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 SDI INR18650-30Q\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\"\u003eCapacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3,000mAh (minimum ~2,900mAh)\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\"\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\"\u003eFull Charge 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\"\u003eDischarge 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\"\u003e2.5V\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\"\u003e15A\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\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\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eWeight\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~45-48g per 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=\"33:1-33:105;1914-2018\"\u003eThese are genuine cells verified against Samsung's official datasheet, not rewrapped or relabeled stock.\u003c\/p\u003e\n\u003cp data-sourcepos=\"33:1-33:105;1914-2018\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eThis listing is for Flat Top. For Button Top,\u003ca href=\"https:\/\/oneandes.com\/product\/samsung-30q-3000mah-15a-button-top-battery-4-pack-with-xtar-vc4sl-charger-high-drain-power-kit-for-vapes-tactical-flashlights-power-tools\/\"\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=\"35:1-35:30;2020-2049\"\u003eXTAR VC4SL — Charger Specs\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"37:1-50:155;2051-3509\"\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, QC3.0 (9V⎓2A)\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 (CC)\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3A×1 \/ 2A×2 \/ 1A×4 \/ 0.5A×4 \/ 0.25A×4 — steps down automatically as more slots are occupied, or can be manually adjusted within what the slot count allows\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 → constant current → constant voltage), 4 independently monitored slots, dynamic power allocation based on input power available\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\"\u003e4.2V ±0.05V (Li-ion) \/ 1.45V ±0.1V (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≤120mA\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\"\u003eL156mm x W115mm x H35mm\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\"\u003e212g\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\"\u003eDisplay\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eColor LCD — press Mode to cycle between capacity, current, and internal resistance readouts per slot in real time\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 Modes\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCapacity\/grading mode (charge → discharge → recharge cycle to verify true capacity), storage mode (charges or discharges cells to their rated storage voltage to extend battery life), standard charge mode\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: 10440, 14500, 14650, 16340, 17335, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650, flat-top 32650. 1.2V Ni-MH\/Ni-Cd: AAA, AA, A, SC, C. Supports protected 20700\/21700 cells; spring-loaded slots can also fit two 32650s and two 18650s at once\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\"\u003eReverse polarity protection (displays \"Err,\" shows 0V, and stops automatically), auto cut-off when fully charged, multiple charge protections\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=\"52:1-52:442;3511-3952\"\u003e\u003cstrong\u003eA realistic note on charge time and power supply:\u003c\/strong\u003e to get the full 1A-per-slot charging with all four bays occupied, you'll need the included QC3.0 Type-C adapter\/cable (9V⎓2A) — the charger auto-adjusts current based on whatever power source it detects, so a basic 5V adapter will still work but at reduced current and longer charge times. With the QC3.0 input active, expect a full charge in roughly 3.5 hours for all four 30Qs at once.\u003c\/p\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"54:1-54:51;3954-4004\"\u003eWhy the Capacity Test Mode Matters for a 4-Pack\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"56:1-56:469;4006-4474\"\u003eBuying four cells at once is exactly the scenario where verifying consistency pays off. The VC4SL's grading mode runs each cell through a charge-discharge-recharge cycle and reports its actual measured capacity — so instead of just trusting that all four cells hit their rated ~2,900mAh, you can check for yourself before building them into a series or parallel pack. Cells with a wider gap during testing are worth flagging rather than mixing into a tight pack build.\u003c\/p\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"58:1-58:35;4476-4510\"\u003eWhere This Bundle Actually 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=\"60:1-63:158;4512-4992\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"60:1-60:99;4512-4610\"\u003e\n\u003cstrong\u003e4-cell flashlights and lanterns\u003c\/strong\u003e — devices that take a full set of four in series or parallel\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"61:1-61:136;4611-4746\"\u003e\n\u003cstrong\u003eDIY battery packs\u003c\/strong\u003e — 2S2P, 4S, or similar configurations where matched internal resistance across all four cells genuinely matters\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"62:1-62:88;4747-4834\"\u003e\n\u003cstrong\u003ePower tool packs\u003c\/strong\u003e where you're testing a batch before committing to a larger build\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"63:1-63:158;4835-4992\"\u003e\n\u003cstrong\u003eAnyone who wants ongoing verification\u003c\/strong\u003e — the VC4SL's grading mode is useful well beyond this initial purchase, for testing any future 18650s you pick up\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"65:1-65:182;4994-5175\"\u003eNot the right fit if your device only takes two cells, or if you don't need per-cell monitoring — a simpler 2-slot charger like the XTAR MC2 covers that case at a lower price point.\u003c\/p\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"67:1-67:48;5177-5224\"\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=\"69:1-72:154;5226-5921\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"69:1-69:161;5226-5386\"\u003e\n\u003cstrong\u003eThe 30Q 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=\"70:1-70:194;5387-5580\"\u003e\n\u003cstrong\u003eDon't mix these cells with older ones you already own\u003c\/strong\u003e, even if they're also 30Q — that's exactly what the grading mode is for, if you want to check compatibility before combining batches.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"71:1-71:187;5581-5767\"\u003e\n\u003cstrong\u003eFlat Top won't work in devices that specifically require Button Top cells\u003c\/strong\u003e — check your device's battery compartment before ordering if you're not sure which terminal type it needs.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"72:1-72:154;5768-5921\"\u003e\n\u003cstrong\u003eFor full charging speed, use a QC3.0 power adapter\u003c\/strong\u003e, not just any USB-C charger — the VC4SL negotiates higher power with QC3.0 sources specifically.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"74:1-74:30;5923-5952\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"76:1-77:230;5954-6249\"\u003e\u003cstrong\u003eCan this charger really tell me if a cell is underperforming?\u003c\/strong\u003e Yes — the grading\/capacity test mode charges, discharges, and recharges a cell while measuring the actual capacity delivered, rather than relying on the printed rating. It's a genuine diagnostic tool, not just a charge indicator.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"79:1-80:192;6251-6490\"\u003e\u003cstrong\u003eDo I need to charge all four cells at once?\u003c\/strong\u003e No — each of the four slots operates independently, so you can charge one, two, three, or four cells at a time, and mix different cell sizes or even NiMH batteries across the slots if needed.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"82:1-83:261;6492-6795\"\u003e\u003cstrong\u003eWill Flat Top cells work in my device?\u003c\/strong\u003e If your device uses spring-loaded, flat, or magnetic-style contacts without a raised positive terminal requirement, Flat Top is the correct choice. If your device specifically calls for Button Top (a raised positive terminal), you'll want that version instead.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"85:1-86:216;6797-7062\"\u003e\u003cstrong\u003eWhat happens if I don't have a QC3.0 adapter?\u003c\/strong\u003e The VC4SL will still charge normally on a standard USB-C power source, just at reduced current and correspondingly longer charge times. For the fastest charging across all four slots, a QC3.0 adapter is worth using.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"88:1-89:198;7064-7304\"\u003e\u003cstrong\u003eIs this kit protected-cell compatible?\u003c\/strong\u003e Yes, the VC4SL supports protected 21700 cells up to 79.5mm if you use it for those later. The Samsung 30Q cells included in this bundle are unprotected bare cells, which is standard for this model.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"91:1-92:236;7306-7606\"\u003e\u003cstrong\u003eWhat's the difference between storage mode and grading mode?\u003c\/strong\u003e Storage mode charges or discharges a cell to its rated storage voltage to help preserve battery life during long-term storage. Grading mode runs a full charge-discharge-recharge cycle specifically to measure the cell's actual capacity.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"94:1-95:216;7608-7870\"\u003e\u003cstrong\u003eWhat happens if I insert a cell backwards?\u003c\/strong\u003e The display shows \"Err\" for that slot and the voltage reading drops to 0 — the charger stops working on that slot automatically rather than attempting to charge. Remove the cell, check its orientation, and reinsert.\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=\"99:1-99:200;7877-8076\"\u003e\u003cstrong\u003eIn stock now.\u003c\/strong\u003e This bundle ships as a matched set of four genuine Samsung 30Q Flat Top cells with a verified XTAR VC4SL charger — ready to test, charge, and deploy in 4-cell builds out of the box.\u003c\/p\u003e","brand":"Samsung","offers":[{"title":"Default Title","offer_id":51454217093366,"sku":"OAS1169","price":67.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/samsung-30q-button-4pack-vc4sl-hero_6bc47d38-d7df-4279-9aee-1a315e91ede9.webp?v=1786968364","url":"https:\/\/oneandes.com\/products\/samsung-30q-3000mah-15a-flat-top-battery-4-pack-with-xtar-vc4sl-charger-high-drain-power-bundle-for-edc-flashlights-drones-cordless-tools","provider":"OneAndes","version":"1.0","type":"link"}