Use 'old' wall chargers for new Play and Force phones?

[mosinandroid]

The wife and I are finally getting new phones this week. I will have the Play and she will have the Force. I've been doing a lot of reading about power and USB C cables and yadda yadda. What I'm most concerned with is safety of charging the phones. I won't be using any adapters for my existing USB B cables but what about the wall chargers themselves? I got a handful of them laying around from various brands that accept USB A cables.
Example 1:
Samsung
Output is 5.0V, 2.0A

Example 2:
HTC
Output is 5.0V, 1.0A

Are either of these safe to charge with? Is there a minimum amp that I should look for as in too low of a amp would damage the phone?

Thanks for the help.

 

[mobrules]

It been using all my old wall chargers since day 1. Got the Force on release date. No issues whatsoever. Only time I use the rapid charger(supplied charger) is if I am pressed for time. I haven't had any issues with the chargers.


I also use the adapters because I had so many micro USB cables around. Not making a recommendation just saying they work.

 

[D13H4RD2L1V3]

They'll charge fine. I use a couple of older wallwarts and the Moto Z had no issue charging on them.

 

[dpham00]

Either is fine. It will just charge slower than the stock one but won't cause any damage