Can I use a 5.0V = 1.55A charger to charge a 800mAH device?

I got my J7 Prime charger that

Input: 100-240 V - 50-60 Hz 0.3 A
Output: 5.0 V = 1.55A

and i want to know that is it safe using it to charge a 800mAH PS4 charger?

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