{"product_id":"eve-40pl-4000mah-70a-21700-battery-4-pack-with-nitecore-ums4-charger","title":"EVE 40PL 4000mAh 70A 21700 Battery 4-Pack with Nitecore UMS4 Charger","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;173-191\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:649;193-841\"\u003eThe EVE 40PL is a tabless 21700 cell engineered specifically to minimize internal impedance and maximize power output — a 4000mAh capacity backed by a genuine 70A continuous discharge rating (with thermal cutoff at 80°C), putting it among the most aggressive high-power 21700 cells on the market. A set this capable deserves a charger that can handle every cell at once while keeping close watch on their health. This bundle pairs 4 genuine EVE INR21700-40PL batteries with the NITECORE UMS4, a QC-enabled 4-slot charger with a detailed LCD display, independent bay control, and multiple layers of protection — ready to use straight out of the box.\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=\"12:1-12:36;848-883\"\u003eEVE INR21700-40PL Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-28:114;885-1610\"\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\"\u003eEVE INR21700-40PL (Flat Top, Tabless)\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 Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4000mAh\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\"\u003eMinimum\/Standard Discharge Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4000mAh\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\"\u003e70A (80°C thermal 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\"\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\"\u003e4.20V\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\"\u003eCell Design\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTabless construction, engineered to reduce internal impedance and increase power output\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\"\u003eLi-ion, ultra-high-power\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\"\u003e21700 (approx. Φ21.15mm × 70.15mm, approx. weight 67g)\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 only\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\"\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\"\u003ePower tools, garden equipment, electric two-wheelers, custom high-drain battery pack assemblies\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=\"30:1-30:265;1612-1876\"\u003e\u003cem\u003eImportant: EVE recommends the 40PL be used in properly engineered battery packs with temperature monitoring and appropriate BMS\/PCB protection — it's built as a high-power cell for engineered battery systems, not as a casual standalone consumer replacement cell.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"32:1-32:182;1878-2059\"\u003e\u003cem\u003eThis is an unprotected cell — 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=\"36:1-36:30;2066-2095\"\u003eThe Charger: NITECORE UMS4\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=\"38:1-46:95;2097-3339\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"38:1-38:247;2097-2343\"\u003e\n\u003cstrong\u003eUSB-C input with QC support\u003c\/strong\u003e: up to 4,000mA total output; up to 3,000mA on a single bay with a QC adapter — the fastest option here for this high-power cell, though still conservative compared to what an engineered fast charger could deliver\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"39:1-39:109;2344-2452\"\u003e\n\u003cstrong\u003eQC Mode output\u003c\/strong\u003e: 3,000mA×1 \/ 2,000mA×2 \/ 1,000mA×4 — \u003cstrong\u003eStandard Mode\u003c\/strong\u003e: 2,000mA×1 \/ 1,000mA×2 \/ 500mA×4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:121;2453-2573\"\u003e\n\u003cstrong\u003eIndependent 4-bay control\u003c\/strong\u003e: charge and monitor up to 4 batteries separately, with each bay unaffected by the others\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:202;2574-2775\"\u003e\n\u003cstrong\u003eDetailed real-time LCD display\u003c\/strong\u003e: shows battery health (Good\/Poor), internal resistance, charging current, voltage, battery type, charged capacity, charging time, cut-off voltage, and charging mode\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:116;2776-2891\"\u003e\n\u003cstrong\u003e3 automatic charging modes\u003c\/strong\u003e: CC, CV, and -dV\/dt, selected automatically based on battery type and charge level\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:88;2892-2979\"\u003e\n\u003cstrong\u003eManual adjustment\u003c\/strong\u003e: set charging voltage and current for specialized battery types\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:192;2980-3171\"\u003e\n\u003cstrong\u003eSafety features\u003c\/strong\u003e: automatic internal resistance detection, reverse-polarity and short-circuit protection, overtime charging protection, and over-discharged battery activation\/restoration\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:73;3172-3244\"\u003e\n\u003cstrong\u003eFire-retardant PC\/ABS housing\u003c\/strong\u003e with built-in temperature regulation\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:95;3245-3339\"\u003e\n\u003cstrong\u003eUniversal power input\u003c\/strong\u003e: works with wall adapters, power banks, and solar panels via USB-C\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=\"50:1-50:53;3346-3398\"\u003eNITECORE UMS4 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"52:1-52:144;3400-3543\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion, 3.8V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH\/Ni-Cd batteries\u003c\/strong\u003e, including the EVE 40PL (21700) in this bundle:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"54:1-55:33;3545-3773\"\u003eIMR\/Li-ion\/LiFePO4: 10440, 14500, 14650, 16500, 16340 (RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700 Ni-MH\/Ni-Cd: AA, AAA, AAAA, C, D\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"57:1-57:68;3775-3842\"\u003e\u003cstrong\u003eOutput current:\u003c\/strong\u003e up to 3,000mA per bay (QC mode) \/ 4,000mA total\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=\"61:1-61:23;3849-3871\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"63:1-63:365;3873-4237\"\u003eThe UMS4 uses spring-loaded contacts and its bays are sized to comfortably fit 21700 cells like the 40PL. Its higher per-bay output (up to 3,000mA with a QC adapter on a single bay) charges this high-power cell noticeably faster than a basic dual-slot travel charger, though it's still more conservative than what a dedicated engineered fast charger could deliver.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"65:1-65:239;4239-4477\"\u003e\u003cem\u003eNote: With all 4 bays occupied, each will charge more gently at up to 1,000mA (QC mode) or 500mA (standard mode) — a safe, steady pace for four high-power cells at once, though full charges will still take a few hours at these currents.\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=\"69:1-69:19;4484-4502\"\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=\"71:1-74:18;4504-4614\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"71:1-71:32;4504-4535\"\u003eEVE INR21700-40PL Battery × 4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"72:1-72:34;4536-4569\"\u003eNITECORE UMS4 4-Bay Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"73:1-73:27;4570-4596\"\u003eUSB-C Charging Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"74:1-74:18;4597-4614\"\u003eUser Manual × 1\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=\"78:1-78:15;4621-4635\"\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=\"80:1-84:50;4637-5148\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:105;4637-4741\"\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=\"81:1-81:63;4742-4804\"\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=\"82:1-82:75;4805-4879\"\u003eCharge only with a genuine, compatible charger such as the NITECORE UMS4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"83:1-83:219;4880-5098\"\u003eThe 40PL is an unprotected, ultra-high-power cell intended for use within a properly engineered battery pack with its own BMS\/PCB protection — do not use it as a standalone replacement cell in casual consumer devices\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"84:1-84:50;5099-5148\"\u003eNever discharge below 2.5V or charge above 4.2V\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=\"88:1-88:7;5155-5161\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"90:1-91:259;5163-5484\"\u003e\u003cstrong\u003eQ: Can the NITECORE UMS4 charge EVE 40PL batteries safely?\u003c\/strong\u003e A: Yes. The UMS4 automatically detects Li-ion chemistry and applies the correct charging voltage (4.2V) and current for 40PL cells, with real-time monitoring on its LCD display, and it charges these cells considerably faster than a basic low-current charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"93:1-94:278;5486-5836\"\u003e\u003cstrong\u003eQ: Is the 40PL meant for use in standalone devices like flashlights?\u003c\/strong\u003e A: EVE recommends the 40PL be used in properly engineered battery packs with temperature monitoring and BMS\/PCB protection, not as a standalone drop-in cell for casual consumer devices. It's built for power tools, electric two-wheelers, and engineered high-drain battery packs.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"96:1-97:283;5838-6167\"\u003e\u003cstrong\u003eQ: What does \"tabless\" mean for this cell?\u003c\/strong\u003e A: Tabless construction connects the electrode foil directly around the full circumference of the cell rather than through a narrow tab, which significantly reduces internal resistance and lets the cell handle much higher continuous current — a big part of why the 40PL reaches 70A.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"99:1-100:188;6169-6410\"\u003e\u003cstrong\u003eQ: Can I charge all 4 batteries at the same time?\u003c\/strong\u003e A: Yes. The UMS4 has 4 independent bays and can charge all 4 cells simultaneously — up to 1,000mA per bay in QC mode, or 500mA per bay in standard mode, when all 4 slots are used at once.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"102:1-103:123;6412-6588\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit properly in the UMS4?\u003c\/strong\u003e A: Yes. The UMS4's bays and spring-loaded contacts are sized to accommodate 21700 cells like the 40PL without any adapter.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"105:1-106:173;6590-6814\"\u003e\u003cstrong\u003eQ: How do I know if a 40PL battery is degraded?\u003c\/strong\u003e A: The UMS4's LCD display shows battery health as \"Good\" or \"Poor\" along with internal resistance readings, 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=\"108:1-109:102;6816-6943\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 4 EVE INR21700-40PL batteries, 1 NITECORE UMS4 charger, a USB-C charging cable, and a user manual.\u003c\/p\u003e","brand":"EVE","offers":[{"title":"Default Title","offer_id":51454226301174,"sku":"OAS1824","price":98.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/nitecore-ums4-eve-40pl-flat-top-4pack-kit-main_25ed1e7d-1f79-4526-b90a-507b690936e9.webp?v=1786968806","url":"https:\/\/oneandes.com\/products\/eve-40pl-4000mah-70a-21700-battery-4-pack-with-nitecore-ums4-charger","provider":"OneAndes","version":"1.0","type":"link"}