Variable DC power supply unit making procedure (mobile phone short circuit killer)

This video is about how do I make the DC variable power supply unit

[@babla99]

বাংলা ভাষায় ভালো প্রচেষ্টা।

[@strelavarss9146]

كم امبير يمكن ان يتحمل الخرج

[@indrajitmondal5412]

Don't mind Sir, somasto instrument kine dile Radio ar calour Telivision banano ta dhape dhape shekhaben? Apnar time mato aste aste sekhale khub upokar hoto please Sir, shekhanna.

[@indrajitmondal5412]

Thanks you Sir

[@shafqatmustafa9166]

Can you translate it in english please.