Power Bank under $10

thingiverse

We've all felt that helpless and anguished feeling when a dead cellphone battery leaves us cut off from the internet and contact with others, making it impossible to navigate. What's someone supposed to do while waiting for the bus, train, or plane with nothing but a few tools? With just a 3D printer, soldering iron, glue gun, a cheap powerbank module, and some 18650 cells (from a laptop battery), you can make your own smartphone powerbank. Here's everything we need: a. Soldering iron - You can buy one from gearbest.com for under $10. https://www.gearbest.com/soldering-supplies/pp_314434.html?lkid=11890789 b. Strippers - Get some from gearbest.com, they're pretty cheap. https://www.gearbest.com/pliers/pp_591318.html?lkid=11890832 c. Powerbank module - I got mine for around $1.50 on aliexpress. https://www.aliexpress.com/item/Dual-USB-18650-Battery-Charger-PCB-Power-Module-5V-1A-2-1A-Mobile-Power-Bank-Accessories/32814288806.html?spm=2114.search0104.3.1.NbWW7S&ws_ab_test=searchweb0_0,searchweb201602_4_10152_10065_10151_10344_10068_10345_10342_10343_10340_10341_10541_10562_10084_10083_10307_10175_5680015_10060_10155_10154_10056_10055_10539_10537_10312_10536_10059_10313_10314_10534_10533_100031_10103_10073_10102_10557_10142_10107-10344,searchweb201603_25,ppcSwitch_5&algo_expid=f3356c9c-c45c-40f8-8b32-d9eb91a5674d-0&algo_pvid=f3356c9c-c45c-40f8-8b32-d9eb91a5674d d. 18650 cells - You can salvage these from old laptop batteries or buy some. https://www.gearbest.com/batteries/pp_383600.html?lkid=11890837