Problems charging older iPad
I suspect the output of the travel adaptor is too low. 

I admit that I've had several iPads from that era, and on occasion ignored Apple's guidance (they would list groupings that would work, but didn't have a "don't do this list of combinations). 

But .7 is pretty low. If the model is using lightning (iPad original (4th gen) and iPad Mini (original)?) then you might want to check the both sides of the connector for lint or material that is interfering with the connection. (This was a big improvement over iPod/style, but it is more prone to contact problems over the lifetime of the unit).

There's a very good discussion about iPads and charging here -> 
Can I use my iPhone charger with my iPad?