Hi, so the house my friend has been living in in Los Angeles area has a First Alert P1210 smoke/fire alarm that started chirping in the middle of the night.

It's a consumable like batteries in a smoke detector. - Miniblinds (that have been damaged by the tenant) - Mini blinds where in good working order when the tenant moved in.

Renters in that demographic aren't likely to keep up with the home, increasing the chances of moisture/mold build up, soft spots, interior rot, heavy smoking damage, etc.

Well, I've been living in this house for quite a year now, and the Landlord is always being disrespectful with us and always taking too much to fix things in this 10 years old house that is falling in peaces , last week our a.c broke, it wasn't getting cold, so we asked him and only 4 days later someone came to "help", and the a.c. was working again for 2 days, and then it got it broke (the air made an explosion sound and there was smoke coming out of my son's bedroom air ventilation) so we turned the a.c. off and open the windows so the burning smell would go away and then we called the Landlord and told him about what happened and that we need it him to call someone to fix it or something, anything.

If is a pantry closet and you can meet the clearance requirement then you will not have to move the panel. another reason we often put smoke/CO detectors close to old panels....they have been known to 'smoke' in older homes before replacement is completed.

Newer tenant who signed a non-smoking agreement when he moved in was smoking pot.

However, I remember being a renter myself and having the hardest time finding a house that wouldn't smell like musk/smoke/cheap perfume/Clorox/animals/other renters/ etc.

You have other tenants who will be bothered by excessively loud partying, roaming dogs, smoking, drugs, and other things you hope to never find out about.

I think he thinks it's all smoke and mirrors : ) It all actually scares him so he's begrudgingly watching me do it so the short answer is no he will not be involved. 

To be blunt here, I think pushing for entry right now for something as menial as checking the expiration date on a smoke detector is pretty darn stupid.