Black SolidSafe™ Duo 5K attached to a phone and opened as a portrait stand, with the round display visible.
Black SolidSafe™ Duo 5K supporting a phone in landscape orientation, with its round display facing forward.
Black SolidSafe™ Duo 5K opened upright in a clamshell-style stand position behind a phone.
SolidSafe™ Duo made for iPhone Duo with custom-fit cells, rotating stand, and semi-solid-state construction
SolidSafe™ Duo 360-degree rotating stand supporting a folding phone in landscape
SolidSafe™ Duo full-color LCD showing battery percentage and live charging wattage
SolidSafe™ Duo snap-on power with 15W magnetic wireless charging for compatible magnetic cases and folding phones
SolidSafe™ Duo attached USB-C lanyard cable with 20W output, 15W input, and 60W cable rating
SolidSafe™ Duo semi-solid-state cell construction with significantly less liquid electrolyte
SolidSafe™ Duo 5,000mAh power bank attached to a folding phone during a commute
SolidSafe™ Duo CNC aluminum housing for strength, low weight, and heat dissipation
SolidSafe™ Duo B8-05 19.55Wh carry-on infographic with IATA guidance and CCC certification
SolidSafe™ Duo compatibility infographic for iPhone 12 through iPhone 17
Front view of the black SolidSafe™ Duo 5K beside its short attached USB-C lanyard cable.
Black SolidSafe™ Duo 5K approaching the back of a phone with a glowing blue alignment ring between them.
Straight front view of the black SolidSafe™ Duo 5K with its circular battery display illuminated.
Straight rear view of the black SolidSafe™ Duo 5K showing its circular charging area and regulatory markings.
Black SolidSafe™ Duo 5K attached to the back of a phone, shown closed at a three-quarter angle.

SOLIDSAFE™ DUO

5K Semi-Solid-State Magnetic Power Bank

Sale price$79.99

A compact 5K cell for folding phones. 15W wireless, 20W USB-C, and a 360° stand.

  • Custom-fit cell: A compact folding-phone footprint.
  • 360° stand: Portrait or landscape while charging.
  • See what’s left: Capacity first, live wattage too.
  • Cable always attached: 20W USB-C charging.
  • Semi-solid-state cells: Help reduce fire risk.
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  • 30-Day Returns
  • 2-Year Warranty
  • Free Shipping

SOLIDSAFE™ DUO

Power shaped for folding phones.

A custom-shaped 5,000mAh cell, with a 360° stand, full-color display, attached USB-C cable, and semi-solid-state cells.

SolidSafe™ Duo feature overview: compact cell, rotating stand, semi-solid-state battery, full-color display, magnetic and USB-C charging, attached cable, and aluminum housing

IN THE PRESS

SolidSafe™. In the press.

“Solid-state battery tech is finally mainstream.”
SolidSafe™ family feature
SolidSafe™ Air
“This is the best MagSafe power bank I’ve ever used.”
SolidSafe™ Air
“If you care about thinness and portability, this is the best option out there.”
SolidSafe™ Air
“It’s the slimmest magnetic wireless power bank full stop.”

360° ROTATING STAND

Hands-free at any angle.

Portrait for reading. Landscape for video. Anywhere between for calls or desk work while SolidSafe™ Duo charges.

SolidSafe™ Duo full-color display showing battery capacity and charging wattage

FULL-COLOR DISPLAY

Know exactly what is left.

Remaining capacity comes first. Live wattage gives you the detail, so you know when to recharge and how fast your device is charging.

15W MAGNETIC WIRELESS

Snap on. Power up.

SolidSafe™ Duo snaps magnetically to your phone for up to 15W wireless charging. No cable to find or port to line up.

SolidSafe™ Duo semi-solid-state cell safety feature

SEMI-SOLID-STATE CELLS

Carry power with less worry.

Semi-solid-state cells use significantly less liquid electrolyte than conventional lithium-ion, helping reduce fire risk.

PRODUCT DETAILS

Built around how you use your phone.

A custom-shaped 5,000mAh cell, a stand that rotates with the screen, capacity you can see, and a 20W USB-C cable that stays attached.

Compact folding-phone footprint 77 × 88 × 11mm body with a custom-shaped 5,000mAh cell.
5,000mAh battery capacity 5,000mAh nominal capacity, 19.55Wh energy, and 3,000mAh rated capacity at 5V/2A.
Phone compatibility iPhone 12, iPhone 13, iPhone 14, iPhone 15, iPhone 16, iPhone 17, and Google Pixel Fold.
360° rotating kickstand Rotates through portrait, landscape, and intermediate viewing angles while the phone is charging.
Full-color TFT LCD Shows remaining battery capacity and live charging wattage.
15W magnetic wireless charging Supports 5W, 7.5W, and 15W magnetic wireless output.
Semi-solid-state battery cells Significantly less liquid electrolyte than conventional lithium-ion, helping reduce fire risk.
Attached USB-C lanyard cable Built into the power bank for charging devices and recharging the battery without a separate cable.
20W USB-C output Supports 5V/3A and 9V/2.22A output, 15W USB-C input, and 10W USB-C + 5W wireless dual output.
CNC aluminum housing Rigid CNC-machined aluminum construction that helps dissipate heat through the housing.

SPECIFICATIONS

Know what you are carrying.

Capacity, charging modes, display, stand, cable, material, dimensions, weight, and what is included.

Battery capacity
5,000mAh
Nominal capacity of the internal battery cells.
Energy
19.55Wh
Watt-hour rating for travel and battery classification.
Rated capacity
3,000mAh at 5V/2A
Usable rated output after voltage conversion.
Battery platform
Semi-solid-state cells
Significantly less liquid electrolyte than conventional lithium-ion helps reduce fire risk.
Wireless output
5W / 7.5W / 15W
Magnetic wireless charging up to 15W.
USB-C output
Up to 20W
5V/3A or 9V/2.22A wired output.
Dual-device output
10W USB-C + 5W wireless
Charge one wired device and one wireless device at the same time.
USB-C input
Up to 15W
5V/3A or 9V/1.67A recharge input.
Display
Full-color TFT LCD
Shows remaining battery capacity and live charging wattage.
Stand
360° rotating ring stand
Supports portrait, landscape, and viewing angles between.
Attached cable
USB-C lanyard cable
Charges devices and recharges the power bank without a separate cable.
Material
CNC aluminum
CNC-machined aluminum housing.
Dimensions
77 × 88 × 11mm
Compact footprint designed for everyday carry.
Product weight
126.7g
Bare product weight without retail packaging.
In the box
Power bank + USB-C Lanyard Cable + Quick Start Guide
USB-C lanyard cable is attached to the power bank.

FAQ

Straight answers before you carry it.

Phone fit, charging speed, display, stand, semi-solid-state cells, and travel.

Why does SolidSafe™ Duo have this shape?

Its custom 5,000mAh cell makes a compact 77 × 88mm footprint possible, with wireless power, a rotating stand, a full-color display, and an attached USB-C cable.

How fast does SolidSafe™ Duo charge?

It provides up to 15W wireless charging or up to 20W through USB-C.

Can it charge two devices simultaneously?

Yes. Dual output provides 10W through USB-C and 5W wirelessly.

What does the display show?

The full-color display puts remaining battery capacity first and also shows live charging wattage.

What can the rotating stand do?

The ring rotates 360° to support portrait reading, landscape video, calls, and desk viewing while your phone charges.

How does SolidSafe™ Duo help reduce fire risk?

Its semi-solid-state cells use significantly less liquid electrolyte than conventional lithium-ion, helping reduce fire risk. No battery is completely risk-free.

Can I recharge it with the attached cable?

Yes. The attached USB-C cable charges devices and recharges SolidSafe™ Duo at up to 15W.

Can I take it on a plane?

At 19.55Wh, SolidSafe™ Duo falls below the standard 100Wh carry-on battery limit. Carry power banks in carry-on luggage and check your airline’s rules.

Does the aluminum housing prevent heat?

Power banks can warm under load. The CNC aluminum housing helps dissipate heat through the body during charging.