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07-20-2002 09:15 PM  16 years agoPost 1
Parsifal

rrVeteran

Singapore

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Hi, i was wondering how low you guys let your batteries run before putting the transmitter on a charger? At full charge, the display states 11.3 volts...this drops quite quickly, say 3 flights or so to 10.3 or so volts...then it slows down a little..how low can i let it drop before the radio's transmiting capabilities are affected?

Also, what would happen if the power drops too low? is range the first thing affected? or are there other tell tail signs?

Thanks.

Indy

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07-21-2002 03:40 AM  16 years agoPost 2
Joel

rrApprentice

Columbia, MS

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I'd say it is too low when you hear the low power alarm(my 8u has one so I'm sure the 9c does). If 4.8v is low for 4 cells then I'd say 9.6 is low for 8 cells.

Joel

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07-21-2002 03:55 AM  16 years agoPost 3
ncostes

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Va, US

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1.1V/cell is discharged for nicads... so 8 x 1.1 = 8.8V is discharged. Wouldn't fly to that point though, but I'm sure your 9c has an alarm, my inexpensive hitec does.

there's not really any benefit to recharging after every other flight, just check your rx pack with a loaded voltmeter.

Go here for great battery info...

http://rcbatteryclinic.com

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07-21-2002 06:42 AM  16 years agoPost 4
helimike77

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La Habra, CA

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I have a 9 C and i can get quite a few flight out of it before the alarm goes off. I use an onboard voltmeter to keep an eye on RX voltage. Make sure to give it inputs from the sticks while reading it to make sure the voltage doesnt drop too low.
Mike

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07-21-2002 04:52 PM  16 years agoPost 5
Parsifal

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Singapore

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Thanks...i have not had the alarm beep yet so i guess i am ok...i usually stop when the voltage gets to about 9.6 anyway...the (C can be quick charged at the field then? i know the (Z needs some sort of bypass modification...does this apply to the 9C? if i am not mistake, it says in the manual that you shouldn't quick charge the Tx...

Indy

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07-22-2002 01:54 PM  16 years agoPost 6
AMCross

rrApprentice

champaign IL

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Pars,
The 9Z and 9C can both be 'quick charged' using MOST peak chargers, but some require voltage feedback in which case the 9Z can not be read due to its diode, but the 9C still can, as it has a polyswitch instead of a diode on board.

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07-23-2002 03:16 AM  16 years agoPost 7
Parsifal

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Singapore

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Thanks AnnMarie...can whip my field charger out now!! great!!

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