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rosslagerwall · 03-24-2014, 02:27 PM

I have a Spektrum DX6i with 4 Duracell AA NiMH 2400mah batteries. The DX6i power supply puts out 100mA. Assuming 100% efficiency, my calculations (and a calculator I found online) suggests that this would take 96 hours to charge which is quite different from the suggested overnight charge. Even if I were using smaller capacity batteries, say 800mah, it would still take 32 hours to completely charge them which sounds too much. Is there something wrong with my calculations?

clwebster · 03-25-2014, 08:14 AM

Here you go. 1.4 x mah divided by ma (charger) = hrs to charge for full form charge. So, 1.4 x 2400 divided by 100ma = 33.6 hrs. Go to RadicalRc for some very good NiCad and Nimh charging infor.

Whomprat · 03-25-2014, 08:22 AM

I have the analyzer.

http://www.mahaenergy.com/chargers/

rosslagerwall · 03-25-2014, 02:12 PM

OK, I see I was getting confused thinking they were connected in parallel in which case the mah of the system would be 4 * 2400, but since it's a 4.8v charger, I guess they're connected in series so the mah remains at 2400.

Well I'm not too worried, anyway. I just ended up charging overnight...

03-24-2014, 02:27 PM	#1 (permalink)
rosslagerwall Registered Users Join Date: Feb 2014	Charging transmitter batteries I have a Spektrum DX6i with 4 Duracell AA NiMH 2400mah batteries. The DX6i power supply puts out 100mA. Assuming 100% efficiency, my calculations (and a calculator I found online) suggests that this would take 96 hours to charge which is quite different from the suggested overnight charge. Even if I were using smaller capacity batteries, say 800mah, it would still take 32 hours to completely charge them which sounds too much. Is there something wrong with my calculations?

03-25-2014, 08:22 AM	#3 (permalink)
Whomprat Registered Users My HF Map location Join Date: Jan 2011	I have the analyzer. http://www.mahaenergy.com/chargers/ __________________ Blade McpX / MQX / 6hv (sold) 3DHS 51" AJ Slick / Crashtesthobby Scythe and Assassin

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03-25-2014, 08:14 AM	#2 (permalink)
clwebster Registered Users Join Date: Sep 2011	Here you go. 1.4 x mah divided by ma (charger) = hrs to charge for full form charge. So, 1.4 x 2400 divided by 100ma = 33.6 hrs. Go to RadicalRc for some very good NiCad and Nimh charging infor.

03-25-2014, 02:12 PM	#4 (permalink)
rosslagerwall Registered Users Thread Starter Join Date: Feb 2014	OK, I see I was getting confused thinking they were connected in parallel in which case the mah of the system would be 4 * 2400, but since it's a 4.8v charger, I guess they're connected in series so the mah remains at 2400. Well I'm not too worried, anyway. I just ended up charging overnight...

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