21700 Power Bank Case – PD 20W, Battery Not Included

Build a compact charging companion around your battery

Give a compatible flat-top 21700 cell a convenient home with this 21700 power bank case. Its solder-free design and removable shell make assembly accessible, while the integrated Type-C cable keeps a charging connection close at hand.

• Single-cell housing: Accommodates one compatible flat-top 21700 battery, sold separately.
• PD up to 20W: Supports the listed fast-charge mode with compatible equipment.
• Solder-free assembly: Lets you install the cell without soldering connections.
• Detachable Type-C cable: Keeps the connection easy to store alongside the case.
• Battery-level lights: Provide a visible indication of charge status.

Pack the assembled case with your everyday essentials and keep your charging setup compact. The removable housing also gives you access to the cell compartment when it is time for maintenance or replacement.

Frequently Asked Questions

Is a battery included?

No. The package contains the power bank housing, not a battery.

Which battery format is listed?

One compatible flat-top 21700 battery.

Does assembly require soldering?

The listed design is solder-free.

What fast charging is supported?

PD output up to 20W is listed; charging performance depends on compatible equipment and the installed cell.

How is polarity indicated?

The spring marks the negative terminal. Install the cell with the indicated polarity.

SPECIFICATIONS

21700 power bank: 21700 charging case

21700 power bank case: diy power bank

Brand Name: diymore

Choice: yes

Condition: New

High-concerned chemical: none

Origin: Mainland China

Quantity: 1

Type: DIY Power Bank Case

diy mobile power case without battery: 21700 battery bank

Battery not included. Install one compatible flat-top 21700 cell with correct polarity; the spring indicates negative. Four charge-level lights and a green fast-charge indicator are listed.