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Homemade External DIY Portable Power Bank Backup Battery USB Charger Smart Mobile Phone with Hold Battery, Laptop cells 18650 new ( buy from EBay ) or take from old laptop batteries broken, Box take from Old modem ADSL,

TP4056 Module buy from EBay about 2USD - very cheap for Powerbank Homemade

More Power Bank Homemade here

<p>the batterys should be in parallel battery goes on the side with out the socket the socket is to go to usb on computer ot cherger to put power into batterys you need a dc to dc 5 volt boost circuit with usb port for the phone charging</p>
<p>that is a lion charger circuit to charge the lion batterys not to step the voltage from 3.7 upto 5 volt needed to charge your phone</p>

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