N6-RB REPLACEABLE 21700 BATTERY POWER BANK — 22.5W FAST CHARGING · 55G ULTRA LIGHT
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Replaceable Battery Power Bank · Swappable 21700 Cell

N6-RB — Replaceable Battery Power Bank

Swappable 21700 Battery · Modular Power Bank · Powered by 21700 Cells

The KangTao Smart N6-RB is a replaceable battery power bank — and a true swappable battery power bank — built on a standard 21700 cell. As a 21700 USB-C power bank with 5000mAh per cell, it takes widely available batteries instead of a proprietary pack: swap in seconds and replace the battery, not the power bank.

$39.99
  • A genuine swappable battery power bank — no sealed cell, no e-waste
  • A power bank with replaceable battery cells, not a sealed unit
  • A portable fast charger for phones, earbuds and handhelds
  • The N6-RB power bank runs on standard 21700 cells — the KangTao 21700 power bank approach
  • A power bank for iPhone, and a power bank for Android phones alike
  • The KangTao Smart power bank system: replace the cell, keep the module
  • One-click swappable 21700 battery — swap in seconds
  • Powered by 21700 cells — a modular power bank built to keep using
  • Up to 22.5W fast charging via USB-C · PD / QC / FCP / AFC / PPS
  • 5000mAh per 21700 battery — carry spares, extend runtime
  • Only 55g — ultra light, made for travel and everyday carry
  • Built-in rotating ring for stress relief
Color — Black
Number of batteries — 1-cell 5000mAh
FAST DELIVERYFully trackable
CERTIFIEDSafety tested
ECO-FRIENDLYRecyclable battery

N6-RB Portable Power Bank with Replaceable 21700 Battery

The KangTao Smart N6-RB is a modular power bank with a replaceable battery — a swappable 21700 cell you can replace instead of replacing the whole unit.

Meet the KangTao Smart N6-RB, a compact portable power bank designed around a replaceable 21700 battery system. Instead of replacing the entire power bank when the battery runs out, simply swap in a charged battery and keep going. With up to 22.5W fast charging, a lightweight 55g design, and a unique rotating ring, N6-RB combines everyday charging with a modular and interactive design.

N6-RB Replaceable Battery Power Bank | 22.5W Fast Charging

Meet the KangTao Smart N6-RB, a compact portable power bank designed around a replaceable 21700 battery system. Instead of replacing the entire power bank when the battery runs out, simply swap in a charged battery and keep going. With up to 22.5W fast charging, a lightweight 55g design, and a unique rotating ring, N6-RB combines everyday charging with a modular and interactive design.

One-Click Replaceable 21700 Battery

N6-RB features a convenient replaceable 21700 battery design. With a simple push, you can quickly remove the depleted battery and swap in a charged one in seconds. Each 21700 battery provides 5000mAh of capacity, giving you the flexibility to carry spare batteries and extend your power bank's runtime whenever you need extra power.

Replace the battery, not the power bank. This modular design helps reduce waste while making everyday charging more flexible and convenient.

22.5W Fast Charging

Power up compatible devices faster with up to 22.5W fast charging. N6-RB supports multiple charging protocols, including PD, QC, FCP, AFC, and PPS, helping provide efficient charging across a variety of compatible devices.

Whether you're topping up your phone during your commute, traveling, or getting ready for your next adventure, N6-RB delivers portable power when you need it.

Compact and Lightweight Portable Design

Designed for everyday carry, N6-RB weighs only 55g and takes up minimal space in your pocket, bag, or travel kit. Its compact form makes it easy to keep backup power within reach without adding unnecessary bulk.

The modular battery design also gives you the flexibility to carry extra batteries separately, making N6-RB a practical portable power bank for commuting, travel, outdoor activities, and everyday use.

Rotating Ring for Stress Relief

More than just a portable charger, N6-RB features a built-in rotating ring designed for interactive use. The ring can rotate smoothly between your fingers, adding a satisfying tactile element to the compact power bank.

Use it as a charging device when you need power and as a small stress-relief or fidget-style accessory when you're taking a break. Its distinctive mechanical-inspired design gives N6-RB a look and feel that's different from traditional power banks.

Multiple Battery Protection Systems

N6-RB is designed with multiple protection features to help provide safer everyday charging and battery use. The protection system helps guard against common electrical and temperature-related risks, including overcharge, over-discharge, overcurrent, overvoltage, short circuit, and excessive temperature.

N6-RB uses a 21700 battery cell and is designed with safety and reliability in mind. The product has also passed multiple safety certifications, providing added assurance for everyday charging, travel, and portable power use.

Choose Your N6-RB Style

N6-RB is available in four distinctive colors to match different styles and personalities. Choose from Starlight Black, Roland Purple, Butterfly Green, and Gardenia Yellow and find the look that fits your everyday carry.








BatterySwappable 21700 cell — replaceable, modular
Capacity5000mAh per 21700 battery
Fast ChargingUp to 22.5W
Port / ProtocolsUSB-C · PD · QC · FCP · AFC · PPS
Weight55g
FeatureRotating ring (stress relief)
ProtectionOvercharge / over-discharge / overcurrent / overvoltage / short circuit / temperature
1× N6-RB Power Bank
1× 21700 Battery (5000mAh)
1× Quick-start guide
Fast delivery, fully trackable with real-time updates. N6-RB has passed multiple safety certifications.
// Replaceable Battery

Replace the Battery. Not the Power Bank.

KangTao Smart N6-RB swappable 21700 battery power bank — One-Click Swappable 21700 Battery
01 / SWAPPABLE

One-Click Swappable 21700 Battery

With a simple push, remove the depleted 21700 battery and drop in a charged one in seconds — power bank battery replacement you do by hand. No tools, no cables, no waiting for a wall outlet.

KangTao Smart N6-RB swappable 21700 battery power bank — How It Differs From a Traditional Power Bank
02 / DIFFERENT

How It Differs From a Traditional Power Bank

A traditional power bank is sealed: when the cell degrades, the whole unit becomes e-waste even though the electronics still work. The N6-RB separates the two, so the module keeps working and only the cell is replaced.

// How It Works

Swap the Battery in Seconds.

No tools, no cables, no waiting. Three steps and you are back at full capacity.

1
Push to release

Push to release

A simple push releases the depleted 21700 cell from the module.

2
Drop in a charged cell

Drop in a charged cell

Slide a charged 21700 cell into place — standard, easy to find, no proprietary pack.

3
Keep going

Keep going

You are back to 5000mAh. The old cell goes to battery recycling, not the bin.

A Standard 21700 Battery. Not a Proprietary Pack.
// Powered by 21700 Cells

A Standard 21700 Battery. Not a Proprietary Pack.

The N6-RB is a 21700 power bank in the fullest sense: it runs on a standard 21700 lithium-ion cell — the same format used in electric vehicles and modern energy storage. That makes it a compact 21700 5000mAh power bank you can carry daily, with replacements easy to find from many manufacturers — so "replaceable" is a real feature, not a claim.

  • 5000mAh per 21700 cell
  • Standard, widely available format (21mm x 70mm)
  • Metal can construction, not a fragile pouch cell
  • Carry a charged spare and swap in seconds
  • Replace the cell, keep the module
// Fast Charging

Up to 22.5W, Over USB-C.

KangTao Smart N6-RB swappable 21700 battery power bank — 22.5W Fast Charging Power Bank
01 / SPEED

22.5W Fast Charging Power Bank

Charge faster with up to 22.5W output — a 22.5W power bank small enough for a pocket, enough for a quick top-up before you head out.

KangTao Smart N6-RB swappable 21700 battery power bank — 21700 USB-C Fast Charging Power Bank
02 / USB-C

21700 USB-C Fast Charging Power Bank

A USB-C fast charging power bank with broad protocol support — PD, QC, FCP, AFC and PPS — so phones, earbuds, handhelds and cameras charge at the speed they expect.

// Product Specs

Product Specs.

Model
N6-RB — Rotary Stress-Relief Replaceable Battery Power Bank
Type
Replaceable battery power bank / modular power bank
Battery System
Swappable 21700 cell — replaceable, modular, one-click swap
Capacity
5000mAh per 21700 battery
Fast Charging
Up to 22.5W
Port
USB-C
Charging Protocols
PD · QC · FCP · AFC · PPS
Weight
55g
Protection
Overcharge, over-discharge, overcurrent, overvoltage, short circuit & excessive temperature
Certification
Passed multiple safety certifications
Colors
Starlight Black · Roland Purple · Butterfly Green · Gardenia Yellow
// Travel & Everyday Carry

Built for Travel. Sized for EDC.

A 21700 power bank built for travel: one 5000mAh cell is about 18.5 Wh — far below the 100 Wh airline threshold — and the whole unit weighs just 55g. Carry the module every day; add spare cells when you travel.

CARRY-ON

Fly with it

Power banks and spare cells travel in carry-on, not checked luggage. One cell is roughly 18.5 Wh, well under the 100 Wh limit — a practical carry-on power bank and travel power bank.

55 GRAMS

Everyday carry

At 55g, it's a lightweight power bank and a true EDC power bank — an everyday carry power bank and a compact EDC charger that disappears into a pocket or sling bag, so carrying it stops being a decision.

SPARE CELLS

Extend on the road

Carry a charged spare cell instead of a second power bank. Less weight, less space, no extra electronics.

OUTDOOR

Outdoor and trail

For hiking and camping, it works as an outdoor power bank and a hiking power bank — spare 21700 cells give you extra days without carrying a heavy camping power bank.

WORK & STUDY

Work and campus

A power bank for work and commuting — equally at home as a portable charger for office desks, and as a portable charger for students through a power bank for college day.

Airline rules vary by carrier. Power banks and spare lithium cells belong in carry-on with terminals protected — always check your airline's current policy before flying.
// FAQ

Questions, Answered.

The N6-RB is a rechargeable battery power bank — a compact, portable power bank built around a standard swappable 21700 cell. It charges your devices on the go, and when the cell wears out you replace the battery rather than the whole unit.

A standard 21700 lithium-ion cell — the same format used in electric vehicles and energy storage. The N6-RB is a power bank with 21700 battery compatibility, not a sealed proprietary pack, so replacements are easy to find.

Yes — the N6-RB is a portable charger with replaceable battery cells, and a true removable battery power bank: one push releases the cell, and a charged 21700 cell drops in within seconds. No tools and no cables required.

On the N6-RB it takes one push. The replaceable power bank battery — a standard 21700 cell — slides out, and a charged one drops in. That makes power bank battery replacement something you do by hand in seconds, instead of binning a sealed unit and buying a new one.

Yes — the N6-RB uses a removable power bank battery in a standard 21700 format, so it can be taken out, charged separately or replaced without tools.

Each 21700 battery provides 5000mAh. Carry additional charged cells separately and swap them in whenever you need more runtime.

Up to 22.5W fast charging over USB-C PD — beyond the 20W PD power bank output most phones expect — with QC, FCP, AFC and PPS also supported.

Yes — the N6-RB is a USB-C power bank, with PD and other common fast-charging protocols supported.

Yes. It weighs 55g, and one 5000mAh 21700 cell is about 18.5 Wh — well under the 100 Wh airline threshold. Power banks and spare cells must go in carry-on, not checked luggage.

A traditional power bank is sealed, so a worn battery means discarding the whole unit. The N6-RB is modular: the cell is a separate, swappable part, so you keep the electronics and replace only the battery.

N6-RB includes multiple protection systems — overcharge, over-discharge, overcurrent, overvoltage, short circuit and temperature — and has passed multiple safety certifications.

Four finishes: Starlight Black, Roland Purple, Butterfly Green and Gardenia Yellow.

// From the Carry

What Our Customers Say.

★★★★★

Swapped a cell mid-flight while the guy next to me was fighting over the outlet. This thing is a flex disguised as a power bank.

@dailycarry.marcus — Verified Buyer
★★★★★

Bought it for the battery. Kept it for the flip. I've spun this thing through three meetings today. My fidget cube is officially retired.

@edc.kai — Verified Buyer
★★★★★

Butterfly Green goes stupid hard with my setup. Two spare 21700 batteries in the sling bag = I'm the charger plug of my friend group now.

@neon.vv — Verified Buyer
// Second Battery Swap

Never Run Dry. Carry Spares.

Each 21700 battery adds 5000mAh. Carry extra swappable cells separately and swap them in seconds — replace the battery, not the power bank.

Never Run Dry.