Anyone know any good cheap portable chargers for switch?

[The Omni Triforcer]

I was thinking about when i bring the switch out that it will die on me so, im wondering if anyone thinks a portable charger is a good idea?
If so do you know of any cheap ones?

 

[Ventus]

Nah youxll need a USB TYPE C charger a d those arent very common riggt now....thicc as ****....u could technically make one woth a 9V and a pos/neg lead but it wouldnt last very long

 

[The Omni Triforcer]

So this one wouldnt work even though it says it works with switch?
https://www.amazon.com/20000mAh-Por...ywords=nintendo+switch+portable+charger&psc=1