How to retrieve photos from water-damaged iPhone

Question

Last week (Wednesday), I my iPhone got wet while I was out of the country.  I immediately put it in a grocery bag of rice (no ziplocks or tupperware available), and put it on top of the refrigerator.  I left it there until the end of my trip on Saturday.  When I got home, I put it on the charger and left it until the local AT&T store opened on Monday.  They weren't able to help me, but suggested I go to the phone repair place across the street where, for $25, he opened it up and dried it out.  It did not come back on for him, but he suggested that I take it home and put it on my charger and see if it will come back on. 
Just to be clear, I am not all that worried about salvaging the phone.  I'm pretty sure it is irretrievably damaged due to the length of time it was in the water and the fact that it was ON and I checked to see if it worked after 24 hours (that's how long they told me to keep it in rice).  I have insurance and can replace the phone.  Everything else was backed up.  What I DO need, is to retrieve the work-related photos that are on the phone that did not get backed up while I was on my trip.  I do not use the cloud, so 3 days worth of photos are on my phone (luckily I backed up before I left the country). I did some surfing and found some steps that say they can sometimes retrieve data from a wet/dead phone, so I tried to turn it on one more time, and was ecstatic to see the little Apple symbol appear followed by the "unlock" screen, but then the phone died again. 
This gave me hope, so I ran back down to the repair shop and he could repeatedly get it to come on, but it shows the battery is dead and it will not stay on long enough to retrieve the data.  He swapped the battery and got it to come on long enough to start the back up but it got about 1/2 way through before it shut itself off again.  The battery in it is the original and it is dead.  He suggested I plug it in and keep trying to get it to come on long enough to dowload the pictures.  I have it plugged in, but it doesn't appear to be charging at all.  Is there something more I can do?  I've seen other posts that suggest keeping it in the rice for over a week.  I've even seen software that says it can retrieve data even from a dead phone ("Wondershare Dr. Fone").  Is there anything I can do to get those pictures?
Thanks!

Answer 1

Search the internet.  This is way beyond the scope of this forum.
Best of luck.
GDG