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Portable DIY POWER BANK CASE 4*21700 Battery Charger for Mobile Phones - Storage Box Shell with 5V 2.1A Charge Capacity
Aliexpress UK
eBay
DIY Power Bank Case for 21700 Cells 100W PD Fast Charge Shell Only Ideal for Travel Backup Laptop Phone Charging
Aliexpress UK
Can be installed 4x flat 21700 lithium battery(battery not included). 1x 21700 Power Bank Case(Batteries not included). The power bank case needs to be welded with batteries in parallel. Size: 95 52 47.5mm.
eBay
Winter-Enhanced PD100W Power Bank Shell, 6×21700 Battery DIY Housing, PPS/PD3.0/QC3.0 for Laptop Phone
Aliexpress UK
eBay
1*21700 Power Bank Case Solder-Free DIY Super fast charging 22.5W Detachable Power Bank DIY Battery Box PD 20W Fast Charging
Aliexpress UK
Core model: 21700 1. Welding-free design, easy to operate, suitable for DIY enthusiasts to quickly assemble and use. DIY Power Bank Case 1. Protection circuit: Yes. Take it out for a long trip, can be brought on the airplane to solve the long-distance travel power troubles.
eBay
Free-welding 21700 Power Bank Case PD 20W Fast Charging Built-in Detachable Type-C Cable Power Bank DIY Battery Case
Aliexpress UK
Applicable battery models 18650/18700/20700/21700 lithium batteries, flat/tip/all compatible. A variety of interfaces with free choice, more convenient to use. Also note that monitor settings may vary from computer to computer and may distort actual colors.
eBay
21700 Power Bank Case PD 20W Fast Charging Built In Cable Detachable Power Bank DIY Battery Case (Without Battery)
Aliexpress UK
In addition, the product does not support modification, welding. The motherboard is retrofitted with an anti-installation chip, installing the reverse does not burn the motherboard, but due to the spring shrapnel is one piece, the battery broken skin, battery short-circuit, a positive and a negative, series connection will cause the burn spring, but re-installed correctly, the motherboard is always able to use normally, will not burn.
eBay
PD20W Power Bank Case High-Capacity 21700 Battery Case Fast Charging Built-in Cable Detachable DIY Power Bank Box
Aliexpress UK
Can be installed 4x flat 21700 lithium battery(battery not included). 1x 21700 Power Bank Case(Batteries not included). Upgrade Plastic Garage Storage Box RC Crawler 1/10 Scale Accessories Decoration.
eBay
4*21700 Power Bank Cases Battery Storage Box Night Light Dual USB Charge DIY Shell for iPhone Xiaomi 21700 Battery Storage Box
Aliexpress UK