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. This bundle pairs 2 genuine EVE INR21700-40PL batteries with the XTAR MC2 — a compact, USB-C powered dual-slot charger that intelligently adjusts charging current and includes 0V activation for over-discharged cells. Everything you need to charge and maintain your cells, ready 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 MC2
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USB-C input: DC 5V/1A, works with USB wall adapters, power banks, laptops, and car chargers
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Dual independent charging slots: charge two batteries simultaneously with individual monitoring
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Intelligent current adjustment: automatically sets charging current to 0.5A×2 (with a 5V/1A source) or 0.25A×2 (with a lower-power source)
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0V Activation: helps recover batteries that have over-discharged
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Multiple safety protections: reverse-polarity protection, short-circuit protection, temperature monitoring
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Compatible with protected 20700/21700 cells (current USB-C generation)
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Ultra-compact & lightweight: just 24g, 92mm × 40mm × 32mm
XTAR MC2 – Supported Battery Types & Voltage
Compatible with 3.6V/3.7V Li-ion batteries, including the EVE 40PL (21700) in this bundle, across a length range of approximately 31mm to 71.4mm — covering everything from 10440 up through 21700 and 26650 cells.
End-of-charge voltage: 4.20±0.05V · End-of-charge current: ≤120mA
Compatibility Notes
The MC2's charging slots accommodate battery lengths up to roughly 71.4mm, which comfortably fits the 40PL's 70.15mm length, including its Flat Top terminal.
Important: High-power tabless cells like the 40PL are typically designed for fast charging in engineered packs, but the MC2 charges at a conservative maximum of 0.5A per slot. A full charge at that rate will take considerably longer than on a high-current charger — expect several hours per full charge. The MC2 is best suited here as a portable, gentle-charging backup rather than your primary charger for these cells.
What's Included
- EVE INR21700-40PL Battery × 2
- XTAR MC2 Charger × 1
- USB 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 MC2
- 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 MC2 charge EVE 40PL batteries safely? A: Yes, the MC2 correctly detects and charges 3.6V/3.7V Li-ion cells including 21700s like the 40PL, with proper 4.2V cutoff voltage. Just be aware the charging current is much lower than what this high-power cell is designed to accept, so a full charge will take considerably longer than it would on a high-current charger.
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 a 21700 battery actually fit in the MC2? A: Yes. The MC2's slots accommodate batteries up to roughly 71.4mm in length, which covers the 40PL's length comfortably.
Q: How long will it take to fully charge a 40PL on the MC2? A: Since the MC2 charges at up to 0.5A per slot, expect a full charge to take considerably longer than it would on a dedicated high-current charger — likely several hours. This charger is better suited as a portable or backup option for these cells rather than a primary fast charger.
Q: Can I charge both batteries at the same time? A: Yes. The MC2 has 2 independent slots and can charge both simultaneously, automatically adjusting current based on your power source.
Q: What's in the box? A: 2 EVE INR21700-40PL batteries, 1 XTAR MC2 charger, a USB cable, and a user manual.
