Fyi, any solar panel that can fit on a power bank is going to output under a watt and I've yet to see a bank with a proper solar charge controller in it cutting that sub watt to a fraction. Don't count on the panel being able to keep up with the bank's self discharge much less recharge the pack.
Fyi, any solar panel that can fit on a power bank is going to output under a watt and I've yet to see a bank with a proper solar charge controller in it cutting that sub watt to a fraction. Don't count on the panel being able to keep up with the bank's self discharge much less recharge the pack.
tl;dr power bank solar is a meme.