Where should I go to get my iphone battery replaced?

My iphone battery is fucked and I need another battery

Apple are going to charge around £60 but if I go to a phone repair shop it'll be around £20

Anyone got any suggestions to where I should go? Apple or just a shop?

Anyone got any experience going to a shop for a repair

IPhone 5s charger not certified for iPhone?

I have been using the apple charger that came with my phone for a while now. It has been working fine but just today I started getting the "this accessory is not certified for this iPhone." Does anyone know how to fix this? It just started out of nowhere and now my phone is almost out of battery

My Iphone 5s is having problems completely out of the blue?

My phone screen doesn't work. Everything looks fine and I still get my notifications but when I try to unlock my phone by typing in my password or something then it doesn't do anything. The only thing that works is the drop down menu and the bottom menu. And when I use siri the screen works perfectly fine and I can scroll up and down but I can't select anything still.

My iphone 4 turn on and my home button won't work?

I was using ny iphone 4 like normal, and i put it in my pocket then 5 mins later i took it out and it won't come on? It was working perfectly fine and now it just won't respond whatso ever? I tried ringing my phone texting my phone, my calls ring but my phone doesn't show anything? My phone is on charge right now, and its not responding and it was full charge.