I am in the fender bandwagon. But, I have been also suggesting a blackstar fly 3!
The blackstar fly 3 is what I take to teach with at students houses and the batteries last for at least 2months with my constant use. Used indoors/outdoors whenever and wherever I feel like practicing.
It is super portable and has a headphone output for silent practice. There are better sounding amps but this one is around $60 when I got it and it gets played the most.