Kindle Dx Battery Replacement Failed

I had a number of battery life problems with my Kindle Dx, and then usb connection problems. Although my battery life problems seemed to resolve themselves, the usb connection problems kep worsening until I couldn't transfer files from my computer any more.

I ordered a battery replacement kit. Due to sensory issues, I can't watch video. Due to a different set of coordination issues, my brother has trouble with tools. I tried to follow his instructions, but the spudger broke. I managed to get part of the back off anyway, but couldn't get farther, so I put it back on.

(I also had some trouble with the sleep switch, but was able to restore that.)

Any suggestions?