Which battery and monitor should I choose?

Question

Raspberry Pi

Hello dear users. I really love the raspberry code, but I would like to take it with me, but I don’t know what to choose. Where and what would you recommend me to buy a battery and monitor?

Answer 1

For example:
Monitor 7" 1024x600
Battery 3800mAh 5V / 1.8A
There are also options with a touch screen

Answer 2

The correctness was violated in that it was possible to insert both Cyrillic and special characters among Latin letters and symbols. But, this solution puts everything in order:
/^[0-9a-z]+$/i

Answer 3

/[A-Za-z0-9]+/ everything works fine
as an option, [^\W_]+