I used a Xaiomi 20,000mAh external pack that has worked really well with the Switch. I also charged it perfectly from both LG and HTC phone chargers. On the oth

I used a Xaiomi 20,000mAh external pack that has worked really well with the Switch. I also charged it perfectly from both LG and HTC phone chargers. On the other hand, the Switch charger refused to charge my phones.