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The ACS 47 however is a different beast - its a powerful, good charger.
It has 3 settings:
1AMP - will take approx 3 hours to peak a 3000mah pack
2AMP - will take approx 1.5 hours to peak a 3000mah pack
4AMP - will take approx 45mins to peak a 3000mah pack

Generally, peak chargers can take any mah pack, so 3000mah are no problem, as are 3300s etc..