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RC-Monster Admin
Offline
Posts: 14,609
Join Date: Nov 2005
Location: Des Moines, IA
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01.18.2007, 02:13 AM
Assuming you want to charge at 1C:
The 5s 4Ah pack requires 84 watts each (4.2v/cell * 5s * 4A). The 3s 2.1Ah pack requires 26.46 watts (4.2v/cell * 3s * 2.1A). Add them together and you get 194.46 watts total. Figuring an 85% charger efficiency, that brings it up to 228.77 watts. If your charger is good for 240 watts, it'll work, but it will be working hard. |
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