Hi guys, I want to design my own portable power bank for phone devices (or any USB devices). I'm still deciding on whether I'll be using 3.7V Li-ion/Li-po battery. Something like this: [image] Custom Promotional Products | Personalized Gift Items with Logo C2BPromo is the No 1 Factory…

Portable phone charger

JamesDoakes August 10, 2016, 12:49pm 3

thanks for the feedback.

Yes, email?