Why won't my iphone charge up?

I have an iphone 3g
and it was passed down from my elder brother, the charger he gave me was a little damaged (the wires at one end inside the plastic were visible)… Sometimes it wouldn't work… So my mum got me another charger from ebay and it wouldn't work at all
then we complained and they sent another free of charge to replace it… Then we realised that the 1st ebay charger did work but there was a printing default on it in the factory and we realised we just needed to insert the charger into the phone with the symbol facing the opposite way…
anyways now we have 3 chargers that work fine but recently my phone won't charge… I've tried different plug sockets, different chargers. I have made sure that everything is inserted properly and still nothing… When it dies i still keep it in and after ages it manages to charge to something under 10% and then it won't charge anymore… The "charging" symbol on the screen won't show up
so i'm thinking… What if its a problem with the actual phone?
Side note: My silent button doesn't work either, when i flick it to make it silent it doesn't go on silent… This has been like this for 5 months now and it doesn't bother me like it did.

I had the same thing and the phone would actually die whilst on charge saying 100% its was driving me crazy but i suggest trying to get a replacement battery off ebay from a decent seller not some cheap Chinese seller as it won't be good quality and if it still doesn't work then i would just suggest a new phone unfortunately. Hope i helped. N good luck! X

Charger answer (if its the problem):
You can never be sure because there are tons of negatives to phones as well as positives so there's a chance it could be the charger! Un-official chargers (not from apple) are always a bit dodgy, my non-official one has to be jammed in for it to work. I recommend you trying one not from eBay, not ore-owned.
iPhone answer (if that's the problem):
It could be the IPhone itself! If you can upgrade, I would, or at least wait until the 5S comes out late-January. It sounds like your phone has had a good run and my friends 3GS seems to be getting a bit tired. If you can't afford one I suggest a repair shop, they will fix the silence problem too.

Hope this helped!

Might need a new battery

Turn it off and on again

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