Gaqqee 8×21700 DIY Power Bank Case – PD 100W Fast Charge
Gaqqee 8×21700 DIY Power Bank Case – PD 100W Fast Charge
Gaqqee 8×21700 Solder-Free DIY Power Bank Case with PD 100W Super-Fast Charging
Build your own high-capacity portable power bank with the Gaqqee 8×21700 DIY Battery Storage Case. Designed for makers, hobbyists, and tech enthusiasts, this solder-free kit accepts eight flat-top 21700 cells and delivers up to 100W via Type-C PD 3.1 — enough to fast-charge laptops, tablets, and smartphones simultaneously. No soldering required: simply insert your batteries and go.
The transparent casing lets you monitor the internal circuit board and battery cells at a glance, while the built-in multi-layer protection system keeps every charge cycle safe and stable. A touch-controlled DC output port adds versatility for powering small laboratory equipment, fans, LED strips, and other DC loads — making this a true all-in-one portable power solution.
Key Features
- PD 100W Super-Fast Charging: Type-C output supports PD 3.1 up to 100W — ideal for modern laptops and high-draw devices.
- Solder-Free 8-Cell Design: Drop in eight flat-top 21700 cells (not included). No tools, no soldering — installation and swaps take seconds.
- Transparent Casing: Clear body lets you visually inspect the circuit board and battery status without opening the case.
- Adjustable DC Output: Press and hold the button to enter DC mode; tap to adjust voltage in 0.1V increments for precise control over compatible DC loads.
- Multi-Port Output: Type-C + USB-A + DC outputs support a wide range of charging protocols including QC 3.0, SCP 40W, PPS 44W, and more.
- Built-In LED Flashlight: Double-click the button to activate; cycle through 100%, 50%, 25% brightness, 10Hz strobe, 3Hz flash, and SOS modes.
- Multi-Layer Protection: Overcurrent, overvoltage, short-circuit, and temperature protections built in for safe, reliable operation.
- CE, RoHS & WEEE Certified: Meets international safety and environmental standards.
Technical Specifications
| Compatible Cells | Flat-top 21700 (no protection circuit) × 8 |
| Input Power | 30–65W (high-performance charger & cable required) |
| Type-C Input Protocols | 5V/3.1A, SCP 40W, PD 3.0 65W, UFCS 33W |
| Type-C Output Protocols | PD 3.1 100W, QC 3.0/3+ 36–45W, SCP 40W, PPS 44W, AFC 18W, and more |
| USB-A Output Protocols | QC 3.0 36W, SCP 40W, PE 2.0+ 45W, AFC/FCP/SFCP 18W, and more |
| Max DC Output | 100W (voltage adjustable in 0.1V steps) |
| USB Output Voltage (multi-port) | 5V (fast charging disabled when multiple ports active) |
| Dimensions | 173 × 64.5 × 52 mm |
| Material | Transparent Plastic |
| Certifications | CE, RoHS, WEEE |
| Country of Origin | Made in Mainland China |
Button Functions
- Double-click: Toggle LED flashlight on/off; single-click to cycle through brightness and flash modes (100% → 50% → 25% → 10Hz strobe → 3Hz flash → SOS).
- Press & hold (2 sec): Enter or exit DC output mode. When "DC" is lit, tap to adjust voltage in 0.1V increments.
Important Usage Notes
- After assembly, charge the unit with a compatible charger to activate it before first use.
- After activation, fully discharge then charge for ~20 hours to balance all cells.
- Use flat-top 21700 cells only — no protection circuits, pointed tops, or damaged cells. Ensure insulation is intact on all batteries before inserting.
What's in the Box
- Power Bank Kit × 1
- Accessory Pack × 1
- 21700 batteries are NOT included.
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Frequently Asked Questions
Q: Do the 21700 batteries come included with the Gaqqee DIY power bank case?
A: No, the 21700 batteries are not included. You need to purchase eight flat-top 21700 cells separately. Make sure they do not have a built-in protection circuit, are in good condition, and have an undamaged positive terminal and intact insulation before inserting them into the case.
Q: What devices can I charge with the PD 100W Type-C output?
A: The Type-C port supports PD 3.1 up to 100W, making it compatible with most modern USB-C laptops (e.g., MacBooks, Dell XPS, Lenovo ThinkPad), tablets, smartphones, and other PD-compatible devices. Note that fast charging is only available when a single port is in use; simultaneous multi-port output is limited to 5V.
Q: Is soldering required to assemble this power bank case?
A: No soldering is required at all. This is a fully solder-free design — simply slide your eight flat-top 21700 cells into the holder, and the case is ready to use. Replacing or removing batteries is equally straightforward.
Q: What does the adjustable DC output do, and what can I power with it?
A: The DC output port delivers up to 100W and allows you to fine-tune the output voltage in 0.1V increments by tapping the button while in DC mode. This is useful for powering small laboratory equipment, DC fans, LED strips, and other variable-voltage DC loads, giving you flexibility beyond standard USB charging.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.