What's in This Bundle
- 4x EVE INR18650-35V, 3,500mAh, Button Top
- 1x XTAR VC4SL 4-slot LCD USB-C charger
- 1x Type-C QC3.0 fast-charge cable, storage pouch, and manual (included with the charger)
A complete kit for anyone running a 4-cell device or building a small pack — four matched, genuine high-capacity cells paired with a charger that does more than just charge: it tests, monitors, and reports on each cell individually.
This listing is for Button Top. Looking for Flat Top? Click here to buy: EVE INR18650-35V Flat Top + XTAR VC4SL 4 Bundle.
Why This Pairing Makes Sense
The 35V is EVE's high-capacity 18650, built for applications that prioritize runtime and energy density while still holding a genuine 10.2A continuous discharge rating — a step up in current capability from purely energy-focused cells while still delivering strong capacity. Four cells bought together as a matched set means consistent capacity and internal resistance across the group, which matters for anything running cells in series or parallel. Button Top is the terminal type required by devices with spring-loaded battery contacts.
The XTAR VC4SL is a real step up from a basic charger: an LCD display showing live capacity, current, 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 cell whose name is easily confused with a similar-sounding Samsung model, that verification is a useful way to confirm exactly what you're working with.
EVE INR18650-35V — Battery Specs
| Parameter |
Value |
| Brand & Model |
EVE Energy INR18650-35V |
| Capacity |
3,500mAh nominal (3,400mAh minimum) |
| Nominal Voltage |
3.6V |
| Max Charge Voltage |
4.20V ±0.005V |
| Standard Charge |
CC-CV, 0.68A, 68mA cutoff |
| Discharge Cutoff Voltage |
2.5V |
| Max Continuous Discharge |
10.2A |
| AC Impedance |
<30mΩ (1kHz) |
| Charge Temperature |
0°C to 50°C (cell surface) |
| Discharge Temperature |
-20°C to 60°C (cell surface) |
| Storage Temperature |
0°C to 60°C |
| Energy Density |
743 Wh/L volumetric, 252 Wh/kg gravimetric |
| Terminal Type |
Button Top |
| Protection Circuit |
None (unprotected cell) |
| Weight |
≤50g (typically ~47g measured) |
| Cell Dimensions |
Diameter 18.35mm, Height 65.10mm |
These specs are consistent across EVE's official datasheet and multiple authorized distributors — the 10.2A discharge figure in particular shows up reliably across sources, without the kind of discrepancy we've flagged on some other cells in this category.
This listing is for Button Top. For Flat Top click here
XTAR VC4SL — Charger Specs
| Parameter |
Value |
| Input |
Type-C, QC3.0 (9V⎓2A) |
| Charging Current (CC) |
3A×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 |
| Charging Method |
3-stage charging (trickle → constant current → constant voltage), 4 independently monitored slots, dynamic power allocation based on input power available |
| Cut-off Voltage |
4.2V ±0.05V (Li-ion) / 1.45V ±0.1V (Ni-MH/Ni-Cd) |
| Cut-off Current |
≤120mA |
| Operating Temperature |
0°C to 40°C |
| Dimensions |
L156mm x W115mm x H35mm |
| Net Weight |
212g |
| Display |
Color LCD — press Mode to cycle between capacity, current, and internal resistance readouts per slot in real time |
| Special Modes |
Capacity/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 |
| Compatible Cell Sizes |
3.6V/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 |
| Safety |
Reverse polarity protection (displays "Err," shows 0V, and stops automatically), auto cut-off when fully charged, multiple charge protections |
A realistic note on charge time: EVE's own quoted standard charge current for this cell is a conservative 0.68A — the VC4SL's 1A-per-slot rate (with all four bays occupied and the QC3.0 adapter active) is actually faster than that reference rate, while still being a safe, moderate current for a 3,500mAh cell. Expect a full charge in roughly 4-4.5 hours for all four cells at once.
Why the Capacity Test Mode Matters for a 4-Pack
Buying 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 ~3,400mAh+, you can check for yourself before building them into a series or parallel pack. It's also a straightforward way to confirm you actually received the EVE 35V and not a mislabeled or substituted cell.
Where the 35V Actually Fits
-
High-capacity flashlights and headlamps — strong runtime with enough current for moderate-to-high output modes
-
E-bike and e-scooter packs where 10.2A per cell in parallel is sufficient
-
4S, 2S2P, or similar DIY pack configurations prioritizing energy density
-
Backup power and portable electronics built from a verified, matched set of four
Not the right choice for sub-ohm mechanical mods, or anything regularly demanding more than 10.2A per cell — for those, a dedicated high-drain cell like the Samsung 25R or 30Q is a better match.
Things Worth Knowing Before You Use This Kit
-
This is an unprotected cell. The charger enforces its own voltage and current cutoffs, but your device still needs to handle discharge-side protection.
-
Don't mix these cells with older ones you already own, even if they're also labeled 35V — that's exactly what the grading mode is for, if you want to check compatibility before combining batches.
-
10.2A is a real ceiling. Don't use these in devices that regularly demand more current than that.
Frequently Asked Questions
Is this the same as the Samsung 35E? No — different brand, different cell. This listing is EVE's INR18650-35V. If you specifically need the Samsung INR18650-35E, check our separate listing for that cell.
Can this charger really tell me if a cell is underperforming? 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.
Do I need to charge all four cells at once? 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.
What happens if I insert a cell backwards? 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.
In stock now. This bundle ships as a matched set of four genuine EVE INR18650-35V Button Top cells with a verified XTAR VC4SL charger — ready for high-capacity flashlights, e-bike packs, and general electronics out of the box.
