How to fix iphone 4s charging issue?

So i officially had updated my iphone to ios 7.1.2 also i had recently jailbreak my phone, when my phone was on it would charge but my battery is dead and as soon as i plug in my 3rd party charger nothing happens either a black screen or that logo that comes up asking me to insert a charger when one is clearly plugged in, i've got no money to buy a new battery and i assure you that my iphone is dust-free

Take it to a repair place, that has a spare battery and a spare docking port on hand. They will tell you which is bad