I am still trying to get my head around all this. When relating to charging the rating is in AH (Amp/Hour). Amps only is for supplying power to non battery equipment. So lets look at both. (They the similar)
If you are hoping to supply power to all of them at the same time then add them all up 6.4A and buy a 7-10A power supply. If they are all batteries to charge which is a weird voltage do the same except by a specific charger. PSU's and Chargers operate slightly differently.
I am not selling PSU's yet but can get a hold of some.
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