Here is a tried and tested sample circuit of a Li-Ion battery charger that can be used to charge any 3.7V Li-Ion battery using a 5VDC (USB, Solar Panel…) power supply. At the heart of the circuit is ...
While smartphone specs and screens have gotten hungrier for power, battery capacity has not kept pace. No wonder then that 'power packs', or external battery based chargers came about, allowing you to ...
Recently I bought a little gizmo called as “USB Charger Doctor” from an online store. The little usb bus powered device features a passthrough usb connection to connect the usb source port and usb ...
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