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Old Jun 03, 2010, 11:47 AM
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United States, AZ, Mesa
Joined Jul 2007
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It's because the charger is limited by wattage, amperage is not really limited. The Thunder Power AC6 is a 50-watt charger... so, a 6S battery is limited to just under 2 amps (due to its 25.2V final charge level). This can make the charge time a lot longer. The more modern setup is to use a powerful charger, and use quality batteries, and then charge at a high rate - most of the time my batteries charge in 15 minutes these days. I'm using the Hyperion charger (250-watt limit), and the Hyperion batteries which can charge at up to 5C - it is a little more money for this setup, but it saves boat loads of time. Now still, I have about a 10-amp limit for a 6S battery, 20-amp limit for a 3S - so some of the larger packs still can't be charged very quickly. So... that is what you get for $100 more on a charger - you save maybe 90 minutes every time you charge.
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