Is this ipad mini 3 charging okay?

Ive just bought an ipad mini to repair. Previous owner said “item has smashed screen. It was working but then froze and wouldnt turn off. Battery finally ran down and turned off. It charged again, but now wont charge or turn on”. So i know it obviously needs a new digitiser, and possibly a new LCD. Ive just put it on charge and its showing 5.17 V, and Amps are between 0.64 - 0.84. Does this indicate a faulty charging port, battery or something else?. Im new to repairing the ipads so any help would be gratefully received. Regards, Gary.