How to Make the Ultimate 18650 Power Bank with Infinitely Expandable Capacity

In this video I will show you the ultimate solution to power on the go. This DIY power bank features a removable battery pack, which can be easily replaced, giving this power bank unlimited capacity as long as you have enough cells. The cost of the row components of this power bank is around 60 dollars, which is two times cheaper than anything commercially equivalent.

WARNING: Do everything at your own risk, lithium batteries can catch fire or explode if mishandled. This power bank requires a more than a basic understanding of electronic to complete.

Schematics and the script: https://drive.google.com/drive/folders/12qpkp2NuJ-EspMs0VmSUoi6NCD4o3lEM?usp=sharing
3D print and CAD files: https://grabcad.com/kralyn.3d-1/models
If you need a 3D printer, here is a really good one for only $220(Ender 3):
https://amzn.to/30QC9rj

If you like to see behind the scenes stuff support my channel, get frequent project updates, or chat with me, please consider joining my Patreon: https://www.patreon.com/KRALYN3D

Part links: (some are affiliate)
15x 18650 battery, if you are going to buy new, I recommend these:
https://www.alibaba.com/product-detail/20A-high-discharge-18650-2500mah-3_60842394272.html?spm=a2700.7724838.2017115.120.656b3c15t5pLHy
Or NCR18650B/BD https://www.alibaba.com/product-detail/Original-Japan-NCR18650B-3400mAh-3-7v_60482164381.html?spm=a2700.7724838.2017115.83.178268efmg9Mey
USB 12V quick charge:
eBay:https://www.ebay.com/itm/USB-Fast-Quick-CAR-Charger-Adapter-16W-5-9-12V-3-1A-for-Android-or-iPhone/143148815849?var=442095655563
Amazon: https://amzn.to/2KbJoE5
200W boost converter:
eBay:https://www.ebay.com/itm/200W-DC-DC-Boost-Converter-6-35V-to-6-55V-10A-Step-Up-Voltage-Charger-Power/222147971321
Amazon: https://amzn.to/2KdpvfW
12V Inverter 110V:
ebay:https://www.ebay.com/itm/150W-Power-Inverter-DC-12V-to-110V-Car-AC-Adapter-with-3-1A-two-USB-ports-US/112994629611
Amazon: https://amzn.to/2Wdduyy
12V inverter 220V: You might need to modify the io shield to fit the socket your country needs.
https://www.ebay.com/itm/150W-3-1A-Dual-USB-DC-12V-to-AC-110V-220V-Car-Power-Inverter-Converter-Adapters/352623955879?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160811114145%26meid%3Dcf8c4bf3305d4bdcaaca140d5763b115%26pid%3D100667%26rk%3D3%26rkt%3D8%26sd%3D323813688587%26itm%3D352623955879&_trksid=p2045573.c100667.m2042
Wireless charging circuit:
eBay:https://www.ebay.com/itm/Practical-DIY-PCBA-Circuit-Board-Coil-Wireless-Charging-Qi-Wireless-Charger-USB/283387526814?var=584364033055
Amazon: https://amzn.to/2WAC9w2
DC-DC step down constant current:
eBay:https://www.ebay.com/itm/DC-Step-Down-Voltage-Constant-Current-Buck-Regulator-Battery-Charger-LED-Driver/191902394789
Amazon: https://amzn.to/2WfV93R
Mini DC step down:
eBay:https://www.ebay.com/itm/2pcs-Mini360-3A-DC-Voltage-Step-Down-Power-Converter-Buck-Module-3-3V-5V-9V-12V/382620018157
Amazon: https://amzn.to/2KipmI2
3s BMS with balance:
eBay:https://www.ebay.com/itm/3S-25A-protection-PCB-board-W-balance-BMS-for-18650-Li-ion-lithium-battery-H/153309641527
Amazon: https://amzn.to/2W9FRNU
12v 20A mini relay:
eBay:https://www.ebay.com/itm/SONGLE-10-pcs-Relay-5-Pin-SPDT-SRA-12VDC-CL-DC-12V-Coil-20A-Universal-PCB-N-K8L1/182546713277
Amazon: https://amzn.to/2Min8ev
Temperature switch (4x N.C. 45 degrees & 4x N.O. 45 degrees.)
eBay:https://www.ebay.com/itm/5pcs-40-160-C-Bimetal-Temperatur-e-Thermostat-Control-Switch-N-C-250V-5A-KSD9700/162152873403?var=461125914349
Amazon: https://amzn.to/2QwIhjt
Slide switches:
Amazon: https://amzn.to/2KaQnxe
eBay:https://www.ebay.com/itm/10PCS-4-7mm-2A-125V-SPDT-1P2T-2-Position-3-Pin-Slide-Switch-5mm-Shaft-Straight/192647303542?hash=item2cdaac9176:g:4mYAAOSwK1xbTGDZ
60x10mm fan:
Amazon: https://amzn.to/2WbIiiZ
eBay:https://www.ebay.com/itm/12V-DC-60mm-2Pin-60x60x10mm-CPU-Cooling-Computer-PC-Case-Cooler-6010-Fan-US/192490647474
USB C trigger: https://www.ebay.com/itm/Type-C-USB-C-PD2-0-3-0-to-DC-USB-fast-charge-trigger-Poll-detector-Charging/173725301413?hash=item2872d5baa5:m:mtQk2e9KiBozm3GpMOpgZzQ
RGB controller: https://www.ebay.com/itm/Mini-3-Key-Controller-Dimmer-Amplifier-For-RGB-3528-5050-5630-LED-Light-Strip/182695567707?hash=item2a8981215b:m:m8fh4a4fxff7sF5FI6SpQwg
Heatsinks:https://amzn.to/2ERkypP
XT 60, wires, and RGB strips are salvaged from old electronics.

Music used:
There It Is by ZAYFALL https://soundcloud.com/zayfallmusic
Music promoted by Audio Library https://youtu.be/e9CtjM_2yKg

Spite by ZAYFALL https://soundcloud.com/zayfallmusic
Creative Commons — Attribution 3.0 Unported — CC BY 3.0
http://creativecommons.org/licenses/b...
Music promoted by Audio Library https://youtu.be/PLw9glZjEbQ

Parasail - Silent Partner (No Copyright Music)
https://www.youtube.com/watch?v=MzO4zfNO0kQ
Altro - Epic [NCN Release]
https://www.youtube.com/watch?v=Ove9aWhwtA8