Description
Why This Bundle
The 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 size deserves a charger that can handle every cell at once while keeping tabs on their health. This bundle pairs 8 genuine EVE INR21700-40PL batteries with the XTAR VC8, an 8-bay Type-C charger with real capacity testing, internal resistance detection, and independent monitoring for every slot — ready to use straight out of the box.
EVE INR21700-40PL Specifications
| Item | Spec |
|---|---|
| Model | EVE INR21700-40PL (Flat Top, Tabless) |
| Nominal Capacity | 4000mAh |
| Minimum/Standard Discharge Capacity | 4000mAh |
| Nominal Voltage | 3.6V |
| Max Continuous Discharge | 70A (80°C thermal cutoff) |
| Charge Cutoff Voltage | 4.20V |
| Discharge Cutoff Voltage | 2.5V |
| Cell Design | Tabless construction, engineered to reduce internal impedance and increase power output |
| Chemistry | Li-ion, ultra-high-power |
| Cell Size | 21700 (approx. Φ21.15mm × 70.15mm, approx. weight 67g) |
| Terminal Type | Flat Top only |
| Protection Circuit | None (unprotected cell) |
| Typical Use | Power tools, garden equipment, electric two-wheelers, custom high-drain battery pack assemblies |
Important: 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.
This 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.
The Charger: XTAR VC8
- Type-C input with QC3.0 support: up to 3A on a single bay when battery resistance is low enough — the fastest option here for this high-power cell
- 5 adjustable current levels: 3A×1 / 2A×2 / 1A×4 / 0.5A×8 / 0.25A×8 — manually selectable to match your charging needs
- 8 independent charging slots: each bay monitored and controlled separately
- Real Capacity Test (Grading Mode): on CH1–CH4, the VC8 tests true capacity through a charge–discharge–charge cycle at a stable 300mA discharge current, revealing whether a battery's stated capacity is accurate
- Storage Mode: charges or discharges batteries to their rated storage voltage to maximize battery lifespan
- Smart Battery Type Detection: automatically identifies the battery and selects the optimal charging strategy
- VA LCD Display: real-time voltage, current, mode, battery type, internal resistance, and charged capacity for every slot
- Multiple Safety Protections: over-current, overcharge, over-voltage, and short-circuit protection; automatically stops after full charge; reverse-connection and over-discharge activation for protected cells
- Built from fire-retardant PC/ABS material, with a built-in "Three-Stage Lithium Battery Charging System" (Patent No. 201720828840.6)
XTAR VC8 – Supported Battery Types & Voltage
Compatible with 3.6V/3.7V Li-ion/IMR/INR/ICR batteries, including the EVE 40PL (21700) in this bundle:
10440, 14500, 14650, 16340, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650
Also compatible with 1.2V Ni-MH/Ni-Cd batteries: AAAA, AAA, AA, A, SC, C
End-of-charge voltage: 4.20±0.05V (Li-ion) / 1.45±0.1V (NiMH) · End-of-charge current: <120mA
Compatibility Notes
The VC8's slider-style contacts accommodate battery lengths from 32mm to 76mm, comfortably fitting the 40PL's 70.15mm length. This is a high-power cell built for engineered fast-charging setups, so the VC8 won't match its full potential charge speed even on a single slot, but manually selecting the higher current levels (up to 3A on one slot) gets meaningfully closer than the default 0.5A-per-slot setting used when all 8 bays are occupied.
What's Included
- EVE INR21700-40PL Battery × 8
- XTAR VC8 Charger × 1
- USB-A to USB-C Charging Cable × 1
- User Manual × 1
Safety Tips
- Store batteries in a proper case, keeping them away from loose metal objects to prevent short circuits
- Never disassemble, puncture, burn, or submerge the batteries
- Charge only with a genuine, compatible charger such as the XTAR VC8
- The 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
- Never discharge below 2.5V or charge above 4.2V
FAQ
Q: Can the XTAR VC8 charge EVE 40PL batteries safely? A: Yes. The VC8 automatically detects Li-ion chemistry and applies the correct charging voltage (4.2V) and current for 40PL cells, with independent monitoring on each of its 8 slots.
Q: Is the 40PL meant for use in standalone devices like flashlights? 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.
Q: What does "tabless" mean for this cell? 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.
Q: Will 21700 batteries fit properly in the VC8? A: Yes. The VC8 accommodates battery lengths from 32mm to 76mm, which comfortably covers the 40PL's length.
Q: Can I charge all 8 batteries at the same time? A: Yes. At the default automatic setting, all 8 can charge simultaneously at up to 0.5A per slot. Manually selecting a higher current level (up to 3A) will use fewer slots at once but charge those cells noticeably faster.
Q: How do I test if a 40PL battery has lost capacity? A: Use the VC8's Grading Mode on CH1–CH4. It runs a charge–discharge–charge cycle to measure true capacity, so you can identify batteries that no longer meet their rated mAh.
Q: Does the VC8 require a special power adapter for fast charging? A: For the fastest speeds (2A/3A settings), a QC3.0-compatible USB-C adapter is required. Without QC3.0, charging current will be limited.
Q: What's in the box? A: 8 EVE INR21700-40PL batteries, 1 XTAR VC8 charger, a USB-A to USB-C charging cable, and a user manual.
Shipping and Returns
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Free Shipping: Enjoy free shipping on all orders over $65. For orders under $65, the shipping cost is $8.99.
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Delivery Time: Once shipped, orders typically arrive within 7–15 business days.
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Easy Returns: We want you to be completely satisfied. If you're not, you can return your product within 30 days of receiving your order. Please ensure the items are unused and in their original condition. For return instructions, please contact our support team.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Security
Refund Policy
OneAndes Return & Refund Policy
At OneAndes, we are committed to providing high-quality cylindrical lithium-ion batteries for your drones, vacuums, garden tools, and other power needs. If you are not completely satisfied with your purchase, we are here to help. Please read our full return policy below before initiating a return.
1. Return Window
You have 30 calendar days from the date you received your item(s) to request a return. Any return request submitted after 30 days will not be eligible for a refund or exchange.
2. Eligibility Conditions
To qualify for a return, all items must meet the following conditions:
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Condition: Items must be unused, undamaged, and in the same condition that you received them.
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Packaging: Items must be returned in their original packaging with all accessories, manuals, and protective covers intact.
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Proof of Purchase: A valid receipt, order confirmation email, or proof of purchase must accompany all returns.
Non-Returnable Items:
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Batteries that have been installed, used, or show any signs of wear.
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Items marked as “Final Sale” or “Clearance” at the time of purchase.
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Customized or special-order products.
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Gift cards.
If a returned item fails to meet these conditions, we reserve the right to deny the return or charge a restocking fee.
3. How to Initiate a Return
Follow these steps to return your product:
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Contact Us: Email our support team at support@oneandes.com with your order number and the reason for return. We aim to respond to all return requests within 24 hours on business days.
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Receive RMA: We will provide you with a Return Merchandise Authorization (RMA) number and return instructions. Do not ship any item without an RMA number.
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Pack Securely: Place the item in its original packaging, include all accessories, and clearly write the RMA number on the outside of the box.
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Ship to Our US Warehouse: Ship the package to the following address:
OneAndes Returns
10320 6th St
Rancho Cucamonga, CA 91730
USA*Important: Lithium-ion batteries are classified as hazardous materials (Class 9). Please follow the shipping guidelines provided in Section 4 below. We recommend using a trackable shipping service and purchasing shipping insurance, as we cannot guarantee receipt of your returned item.*
4. Return Shipping Costs
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Defective or Incorrect Items: If the item you received is defective, damaged in transit, or different from what you ordered, OneAndes will cover the return shipping cost. In this case, we will provide you with a prepaid return shipping label.
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Buyer’s Remorse / Non-Defective Returns: If you are returning an item for any other reason (e.g., no longer needed, ordered the wrong model), you are responsible for the return shipping costs. You must prepay the return shipping cost using a trackable carrier that accepts lithium batteries. We do not provide prepaid return labels for non-defective returns.
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Lithium Battery Shipping Regulations: By law, all returns must be shipped in compliance with applicable dangerous goods regulations. We will provide guidance on proper packaging and labeling. Failure to comply may result in carrier refusal, seizure, or additional fees. We are not responsible for returned items lost or rejected by the carrier due to improper shipping.
5. Refunds
Once we receive and inspect your return at our Rancho Cucamonga, CA facility, we will notify you via email of the approval or rejection of your refund.
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Approved Refunds: If approved, your refund will be processed to your original method of payment within 5 to 10 business days. Please note that depending on your bank or credit card issuer, it may take additional time for the credit to appear on your statement.
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Partial Refunds: In certain situations, only partial refunds may be granted:
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Items not in original condition, missing parts, or damaged for reasons not due to our error.
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Items returned more than 30 days after delivery (reviewed on a case-by-case basis).
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Non-Refundable Fees: Original shipping charges are non-refundable unless the return is due to our error (defective product or incorrect shipment).
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Restocking Fee: We do not charge a restocking fee for defect-free returns, but we may deduct the return shipping cost, which will be deducted from your refund.
6. Exchanges
We replace items only if they are defective or damaged upon arrival. If you need to exchange a defective item for the same product, please contact us at support@oneandes.com. Exchanges are subject to product availability.
If you ordered the wrong battery size or model, please follow the standard return process above and place a new order for the correct item.
7. Damaged or Missing Items
If your package arrives visibly damaged, please take photos of the package before opening and contact us immediately. We will work with the shipping carrier to file a claim and arrange for a replacement or refund. Damaged or missing item claims must be reported within 7 calendar days of delivery. For immediate assistance, you may also call us at (213) 316-8849.
8. Order Cancellation
You may cancel your order without penalty if it has not yet been shipped. To cancel, email us at support@oneandes.com as soon as possible. If the order has already been processed or shipped, you will need to follow the standard return process upon receipt.
9. Warranty
All OneAndes batteries are backed by a 12-month limited warranty against defects in materials and workmanship. This warranty does not cover damage caused by misuse, improper charging, unauthorized modifications, normal wear and tear, or use outside of manufacturer specifications. For warranty claims, please contact our support team.
10. Contact Us
If you have any questions about our Return & Refund Policy, please reach out:
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Email: support@oneandes.com
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Phone: (213) 316-8849 (Mon-Fri, 9 AM – 5 PM Pacific Time)
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Mailing Address: 10320 6th St, Rancho Cucamonga, CA 91730, USA
We aim to respond to all inquiries within 24 hours during business days. Please include your order number for faster assistance.