Power bank
thingiverse
A power bank that reuses cell smartphone batteries. in this case 2 batteries of note 3 for a total of 6400MAh. Link Electronics https://www.banggood.com/it/Dual-USB-5V-1A-2_1A-Mobile-Power-Bank-18650-Battery-Charger-PCB-Module-Board-p-1031593.html?rmmds=myorder&cur_warehouse=CN 15/03/2020 UPDATE: Added version E, internal enlarged to 19mm to insert standard 18650 batteries.
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