Good quality, screws included, works well. It delivers 100W for output and 60W for charging, which is good because it hardly heats up while charging.
-50%
DIY 20000mAh Power Bank Case for 4pcs 21700 Batteries
Original price was: $44.79.$22.39Current price is: $22.39.
Pay now, in 4 interest-free payments of $5.60, or over 3β6 months
4 interest-free payments of $5.60
DIY power bank case supports 4pcs 21700 batteries (not included). Features 100W PD two-way fast charging and real-time LED power display.
- Transparent case design
- Supports laptop and phone charging protocols
- Batteries must be welded in series
6 in stock
β
Estimated Delivery Time3β7 business days
Versatile DIY Power Bank Case
This DIY power bank case is designed to hold four 21700 polymer batteries (not included), offering up to 20000mAh capacity. It features a transparent body and an imported high-quality LED screen to monitor remaining power in real-time.
Designed for users comfortable with welding, batteries must be connected in series to the motherboard for proper operation.
Advanced Fast Charging Support
Supports full protocol two-way PD fast charging at 100W output, compatible with PD, QC, AFC, SCP, and other multi-protocol fast charging standards.
Outputs include two Type-C ports and one USB port, delivering various voltages and currents up to 20V/5A to charge laptops, phones, or tablets efficiently.
- Type-C 1 supports up to 20V/5A output
- Type-C 2 supports up to 20V/3A output
- USB port supports multiple voltages up to 12V/1.5A
Safe and Reliable Design
The device is designed for safety and reliability, allowing air travel without declaration due to its compliant construction.
The battery connection requires welding; necessary wires or batteries are not included, so proper assembly knowledge is essential.
- Includes motherboard and casing only
- Wiring and batteries must be sourced separately
- Activation required by charging after welding
Key Specifications
- Capacity: 20000mAh (requires 4pcs 21700 batteries)
- Material: ABS-PVC
- Color: Black
- Dimensions: Approx. 153 x 55 x 34 mm
- Input: DC 5V/3A, 9V/3A, 12V/1.5A, 10V/2.25A
- Output: Type-C1 5-20V/3-5A, Type-C2 5-20V/3A, USB 5-12V/1.5-3A
What's in the box
- 1x Power bank DIY kit (motherboard and casing) – batteries and cables not included
Discussion
4.9
Based on 51 reviews
Everything works; I soldered it by hand in a hurry, and there's no place where I can work quietly. I have kids running around, but I managed to do everything and installed Samsung 50 batteries; everything works without any problems.
The package arrived quickly. Everything is fine. I assembled the construction set, and everything works as described in the order. When charging at 60W, it heats up and at some point goes into protection mode, then it recovers on its own. Protocols are in the photo. I'm happy with the power supply! 5 stars to the seller!!!
Works perfectly, assembled without any problems. Bought the same one from another seller, the IP3255 chip was faulty, pin 16 was damaged.
I received the device, everything is intact and the set is complete (even 4 extra screws).
It's nice and relatively easy to do.
I soldered everything, 4 batteries. 21700 at 5000mA.
everything works, it outputs up to 45 watts to my phone. which supports such a protocol, other devices are less so in different ways.
Charges quickly with 20 watts and as agreed by the devices.
5+
