/diy/ - Do It Yourself

Hey, im working on an asus memo pad 7 for a friend. They have asked me to attempt to recover some files from it. After some fooling with it i got it to show a red almost empty battery. I left it on the wall charger for 2 hours with no luck. I heard that usb ports on a desktop can do a "trickle charge" so i left it plugged in at work for 9 hours and still no luck. Im guessing the battery is dead, im skeptical about ordering one. Im worried that im going to get an old battery that is dead as well.
I was thinking about powering it with a bench power supply and just bluetoothing or using the usb port to transfer the files off. But the battery connector is a little strange looking, pic related. Can i power this tablet with a bench power supply? Thanks for any help you can provide in regards to this!