How do you get 130 watts from a 2s pack at 5.2 amps ?
No idea how you are working out your requirements
8.4v (2s lipo fully charged) x 5.2 amps requires 44 watts, allow 20% for inefficiencies makes 53 watts or so
Assuming the charger is capable of producing 53 watts it would require a supply of
53 watts divided by 12v (PS voltage) = 4.4 amps or so
If you wanted to use 2 identical chargers to charge the same size packs you would need at least 8.8 amps
Cheers