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Old Aug 21, 2007, 08:22 AM
21st Century Space Cowboy
TachyonDriver's Avatar
Chipping, Lancs, UK
Joined Oct 2006
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Discharge rate? 3300mAh NiMH receiver pack

Thanks to borrowing my mate's super-duper charger, I can control the discharge current. So any ideas how much I should use please?

The receiver pack for my nitro heli is a 4 cell 3300mAh. So does that mean I can charge it at 1C (3.3A)? The pack comes with the normal "servo gauge" wires to connect it to the receiver, but it also has the heavy gauge wiring with a Tamiya plug on it to handle fast charge/discharge situations.

Thanks guys,

Tach.
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Old Aug 21, 2007, 11:05 AM
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United States, GA, Roswell
Joined Mar 2007
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I'd try it at 3.3A and see what happens, but watch it closely, especially when it gets to about 90% full... if the cells start to get hot, back the current off. You should be fine though.

EDIT: I don't know how much you know about nimh batts, but some NiMh batteries have huge capacity but can only handle like 5A discharge (which is fine for powering an Rx)... the lipo "C" rules don't always apply. For example, the 2500mAh AA size "energizer" nimh batteries you can get at walmart can only handle like 3A discharges (great for camera capacitors)... they just wont put out more current than that. Conversely, I have a 1100mAh, 9.6V pack that can sustain 30A discharges (and doesn't even get warm when I charge it at 1.5A)... bottom line is, watch those batteries carefully at the 3.3A charge rate You might be able to charge them at 5A <shrug>
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Old Aug 21, 2007, 03:22 PM
21st Century Space Cowboy
TachyonDriver's Avatar
Chipping, Lancs, UK
Joined Oct 2006
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The charger (pro-peak infinity 2 by Robbe) has a default 5A Discharge rate, the pack is made of 4 x Sub C cells, so I'll go for 5A and see.

Tach.
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Old Aug 21, 2007, 09:29 PM
Our Daddy and Heli Junkie
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Watch the wires and plugs at a sustained 5a dicharge, that is about their limit.

The batteries should handle that fine either way.

FB
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