IPhone 4s Will Charge Sometimes, Will not Connect to Macs or PC's.

I have a year old iPhone 4s, Otterboxed from the beginning. Recently the battery has begun to lose the ability to hold a charge for more than 6 hours or so. Around the same time, I noticed that it was not charging on all of my, or my coworkers chargers. After metering the voltage on the chargers that work, I discovered that it was only charging on chargers that ran slightly higher voltage than normal USB spec. However this problem has proved to be intermittent, and it will occasionally charge on a computer or normal Apple wall charger.
Now to the most alarming consequense. Since my phone started acting up, I have been unable to connect it to any computer. It will not show up as an active device even on a system level. I work for a design and production company where I have many combinations of computers available, so I scooped up 5 known good 30 pin to USB and tried them each on the following systems:
AMD Socket AM2 Windows 8 Desktop
Core 2 Duo Early Unibody MacBook Pro, 10.8.3 and Windows 7
Mac Pro Quad Xeon 10.7
Core 2 Duo Non Unibody MacBook Pro 10.6
AMD Samsung Laptop Windows 7
i7 Retina MacBook Pro, 10.8.3
It was not recognized by the USB controller at any time with any cable. I did a reeboot between every cable and computer swap on both the phone and machine. Needless to say this was very time consuming. I am assuming the hardware in the iPhone is just knackered, I just wanted to be sure. Now before anyone suggests dumping and reloading the OS from the phone itself, the only reason I need to connect at this point is because I have run out of iCloud storage and need to get photos off the phone. I understand I can upload them to Google Drive, but it compresses them in the iPhone app and i would prefer that not to happen.
Any advise would be helpful.
Needless to say I ran these tests with the most current version of software for every device involved.

could be a periodic defect connector in the iphone

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