Thanks audiguru
Batteryspace.com said
You see a 9.6V pack when fully charged will give you an output voltage of 11.2V and I am not sure if that is too high to meet your need. Assuming it is ok, then the issue is what connector you need to connect to your picture frame.
If you are trying to power your picture frame where there is no ac power. You might be best to get a 12V battery pack and get a dc/ac inverter then connect your 9.6V power adapter to it and that will resolve your difference voltage and connector problem.
The last solution seems a long route round and is also costly
many thanks