Panasonic NCR18650-B 3400mAh 4.875A Flat Top Battery 6-Pack with XTAR VC4SL & MC1 Chargers – Comprehensive High-Capacity Power Bundle for EDC Flashlights, Portable Devices & Travel Gear

What's in This Bundle

• 6x Panasonic NCR18650B, 3,400mAh, Flat Top
• 1x XTAR VC4SL 4-slot LCD USB-C charger
• 1x XTAR MC1 single-slot USB-C charger
• Cables, manuals, and storage pouch included with both chargers

This bundle exists because there's no clean single charger that handles exactly 6 cells at once. Rather than force you into a mismatched combo, we've paired the 4-slot VC4SL with the compact single-slot MC1 — together they give you 5 charging slots, so 5 of your 6 cells can charge at the same time, with the last one following right behind.

Flat Top is the NCR18650B's native factory configuration — this is the standard terminal style Panasonic manufactures the cell in, not a converted or adapted version.

This listing is for Flat Top. Looking for Button Top? Click here to buy: Panasonic NCR18650B Button Top + XTAR VC4SL 4 + XTAR MC1 Bundle.

Why This Pairing Makes Sense

The NCR18650B is one of the highest-capacity mainstream 18650 cells available — it earned its reputation in laptop battery packs and early EV applications before becoming a favorite for high-capacity flashlights and DIY packs where runtime matters far more than burst current. Six cells bought together as a matched set means consistent capacity and internal resistance across the whole group. Flat Top is the standard terminal type for most current devices — DIY packs, general electronics, and equipment that doesn't rely on spring-loaded contacts.

The VC4SL handles the bulk of the charging with its LCD display and capacity-test (grading) mode — genuinely useful for a cell like the NCR18650B, where you'll see wildly different discharge ratings advertised across the market and it helps to verify real, measured numbers instead. The MC1 rounds things out as a small, genuinely portable single-slot charger — useful on its own for topping off a spare cell, throwing in a bag, or keeping in the car, not just as filler to hit a slot count.

Panasonic NCR18650B — Battery Specs

A note on discharge current claims: you'll see this cell advertised elsewhere at 6.7A or 6.8A continuous. That figure doesn't match Panasonic's own published spec sheet, which lists 4.875A as the maximum continuous discharge rating. This is a genuine high-capacity, moderate-drain cell — not a high-drain one.

This listing is for Flat Top. For Button Top, click here

XTAR VC4SL — Charger Specs (4 Slots)

XTAR MC1 — Charger Specs (1 Slot)

A realistic note on charging all 6: both the VC4SL (1A per slot with all 4 bays occupied) and the MC1 (1A) charge below this cell's own 1.625A standard charge current — a conservative, safe rate across the board, so all 5 active slots finish at roughly the same pace, in around 4-4.5 hours. The 6th cell follows once a slot opens up.

Why the Capacity Test Mode Matters Here

The NCR18650B is a cell with genuinely inconsistent specs floating around online — you'll see it marketed anywhere from 4.875A to 6.8A depending on the seller. Buying six cells and being able to actually test their real capacity and internal resistance, rather than relying on whatever number happens to be printed on a listing, is a meaningful way to know what you actually bought. The VC4SL's grading mode runs each cell through a full charge-discharge-recharge cycle and reports the measured result — in this bundle, you can work through all six cells across two rounds on the VC4SL (with the MC1 handling overflow along the way).

Where This Bundle Actually Fits

• High-capacity flashlights run at low-to-moderate output — long runtime is the whole point of this cell
• Laptop-style and general electronics packs — its original and most common use case
• 6S, 2S3P, 3S2P, or similar DIY pack configurations where energy density matters more than discharge rate
• Power banks and backup power builds built from a verified, matched set of six

Not the right choice for sub-ohm  high-output flashlights on turbo, or power tools — this cell's discharge ceiling is meaningfully lower than dedicated high-drain cells like the 30Q, 25R, or 20R.

Things Worth Knowing Before You Use This Kit

• This is an unprotected cell. Both chargers enforce their 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 NCR18650B — that's exactly what the grading mode is for, if you want to check compatibility before combining batches.
• Flat Top won't work in devices that specifically require Button Top cells — check your device's battery compartment before ordering if you're not sure which terminal type it needs.
• Don't put these in a high-drain device. A 4.875A ceiling is a real limit — pushing this cell toward the 6-7A figures sometimes advertised elsewhere risks excess heat and accelerated wear.
• The MC1 charges one cell at 1A — it's not meant to replace the VC4SL for bulk charging, just to round out the slot count and serve as a lightweight backup charger.

Frequently Asked Questions

Can all 6 cells charge at the same time? 5 of the 6 can charge simultaneously — 4 on the VC4SL, 1 on the MC1. The 6th cell follows once a slot frees up.

Why do different sellers list different max discharge ratings for this cell? Panasonic's own datasheet lists 4.875A as the maximum continuous discharge current. Some listings advertise 6.7A or 6.8A, which doesn't match that primary source — treat the higher figures with caution rather than as confirmed specs.

Will Flat Top cells work in my device? If your device uses spring-loaded, flat, or magnetic-style contacts without a raised positive terminal requirement, Flat Top is the correct choice — and it's how Panasonic manufactures this cell natively. If your device specifically calls for Button Top (a raised positive terminal), you'll want that version instead.

Can this charger tell me if a cell is underperforming? Yes — the VC4SL's grading mode charges, discharges, and recharges a cell while measuring actual delivered capacity, rather than relying on the printed rating. For a cell like the NCR18650B, where marketed specs vary a lot between sellers, that's a genuinely useful way to verify what you have.

Is this kit protected-cell compatible? Both chargers support protected 21700 cells (the VC4SL also supports protected 20700) if you use them for those later. The Panasonic NCR18650B cells included in this bundle are unprotected bare cells, standard for this model.

In stock now. This bundle ships as a matched set of six genuine Panasonic NCR18650B Flat Top cells with a verified XTAR VC4SL and XTAR MC1 charger combo — ready for high-capacity flashlights, power banks, and other moderate-drain builds out of the box.