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Futaba 4YF Charging Way Too Long

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Old 07-27-2012, 04:03 PM
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Default Futaba 4YF Charging Way Too Long

I've been charging my Futaba 4YF 4-Channel radio for the last 3 days. Though it's been about a year since I've charged it, should it take 3 days & counting to get a full charge?

Both the green & red light on the radio are on. And the red light on the charger is still on, which I thought will go off when fully charged.
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Old 07-27-2012, 04:13 PM
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Default RE: Futaba 4YF Charging Way Too Long

If it really is charging then it depends on the capacity of the cells and the current. It COULD concievably take days to charge a battery.
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Old 07-27-2012, 04:40 PM
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Default RE: Futaba 4YF Charging Way Too Long

Should take no more than 24 hours. How old are the NiCads in it?
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Old 07-27-2012, 05:05 PM
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Default RE: Futaba 4YF Charging Way Too Long

The red light on a wall charger will stay on as long as the charger is plugged into the wall and your radio. How many mil amps are your batteries? How many mil amp is your charger. Your charger output should be about 1/10 of your batteries capacity. You may have a bad battery as well. Normal charge should be accomplished overnight.
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Old 07-27-2012, 06:38 PM
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Default RE: Futaba 4YF Charging Way Too Long

I bought the radio in Feb-2010, with original NiCad battery & charger.
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Old 07-27-2012, 06:43 PM
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Default RE: Futaba 4YF Charging Way Too Long

This is the charger output information -

Tx 9.6VDC - 600mA
Rx 4.8VDC - 100mA

This is the battery information -

capicity: 9.6VDC - 600mAh
charging: 60mA - 15 hours
quick charge: 180mA - 5 hours
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Old 07-27-2012, 06:51 PM
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Default RE: Futaba 4YF Charging Way Too Long

I was thinking that as well, however, in the past I've acheived a full charge in less than15 hours.
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Old 07-27-2012, 07:58 PM
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Default RE: Futaba 4YF Charging Way Too Long

sounds like a dead cell in the pack.
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Old 07-27-2012, 08:10 PM
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Default RE: Futaba 4YF Charging Way Too Long

I was afraid of that. A Dead Cell!! I have no problem buying a new onebut this battery refuse to leave the compartment. It's like frozen tight. Any tips on properly removing it?
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Old 07-28-2012, 12:56 AM
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Default RE: Futaba 4YF Charging Way Too Long

ORIGINAL: SooperFlye I've been charging my Futaba 4YF 4-Channel radio for the last 3 days. Though it's been about a year since I've charged it, should it take 3 days & counting to get a full charge? Both the green & red light on the radio are on. And the red light on the charger is still on, which I thought will go off when fully charged.
ORIGINAL: SooperFlye
This is the charger output information -
Tx 9.6VDC - 600mA
Rx 4.8VDC - 100mA
This is the battery information -
capicity: 9.6VDC - 600mAh
charging: 60mA - 15 hours
quick charge: 180mA - 5 hours
ORIGINAL: SooperFlye I was afraid of that. A Dead Cell!! I have no problem
buying a new onebut this battery refuse to leave the compartment. It's like frozen tight.
Any tips on properly removing it?
As in post #4 that charger is a constant voltage charger, not a peak detect charger.
It does not stop charging until turned off after 10<15hrs.
The 4YF has no voltage indicator apart from the LED .
If both Red &Green LED are lit, TX is indicating OK as per manual page 7
"Two LED display to indicate battery voltage level. If the red LED flashes, replace batteries."

What you have not mentioned is the current voltage of the pack
- full charge should show between 10.1 - 11.1V & one cell down would show a voltage of 8.8<9.6v.

Battery is a firm fit but should drop out when Tx bumped on your palm, if overchargedit could well have
swollen and may require steady leverage a little at a time at each end.
Then check plugs and leads through the charging circuit to On/Off switch for
Black Wire Corrosion

Alan T.
Alan's Hobby, Model & RC FAQ Web Links
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Old 07-28-2012, 05:48 AM
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Default RE: Futaba 4YF Charging Way Too Long

CK YOU BATTERY WITH A METER
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Old 07-28-2012, 05:54 AM
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Default RE: Futaba 4YF Charging Way Too Long


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Old 07-28-2012, 05:55 AM
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Default RE: Futaba 4YF Charging Way Too Long

any recommendations?
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Old 07-28-2012, 05:56 AM
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Default RE: Futaba 4YF Charging Way Too Long


ORIGINAL: SooperFlye

As in post #4 that charger is a constant voltage charger, not a peak detect charger.
It does not stop charging until turned off after 10<15hrs.
The 4YF has no voltage indicator apart from the LED .
If both Red &Green LED are lit, TX is indicating OK as per manual page 7
"Two LED display to indicate battery voltage level. If the red LED flashes, replace batteries."

What you have not mentioned is the current voltage of the pack
- full charge should show between 10.1 - 11.1V & one cell down would show a voltage of 8.8<9.6v.

Battery is a firm fit but should drop out when Tx bumped on your palm, if overchargedit could well have
swollen and may require steady leverage a little at a time at each end.
Then check plugs and leads through the charging circuit to On/Off switch for
Black Wire Corrosion

Alan T.
Alan's Hobby, Model & RC FAQ Web Links
Thanx Alan,,,
hmm, though its been a while, I thought the LED went off when fully charged. Maybe not.

"What you have not mentioned is the current voltage of the pack
- full charge should show between 10.1 - 11.1V & one cell down would show a voltage of 8.8<9.6v."

Alan you seem to suggest a measuring tool is available for checking the Tx battery. Any recommendations? Is there such a tool for Rx?
I was able to finally get the battery out, whew!! I'll wait for feedback about the tools for checking the Tx/Rx.


[/quote]
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Old 07-28-2012, 06:20 AM
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Default RE: Futaba 4YF Charging Way Too Long

THAT OLD OF A BATTERY THROW IT AWAY CHEAPER FOR A NEW BATTERY THEN THE WHOLE PLANE I CHANGE MINE EVERY 2 YRS
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Old 07-28-2012, 06:28 AM
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Default RE: Futaba 4YF Charging Way Too Long

Yep,,,
that's the plan. New battery it is.

Comment:
the servos work though. Is that normal?
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Old 07-28-2012, 11:17 AM
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Default RE: Futaba 4YF Charging Way Too Long

There should be "No Lights On" in the transmitter when you are charging it. The LED's on the charger will remain on as long as the charger is plugged into the wall socket and a battery is being charged. It does not go out when the battery is charged. Check the voltage of the battery with a volt meter if you have one. Since you say the servos are working, evidently the batteries are at least partially charged, the transmitter is working and you may not have a problem. Right off the charger the voltage of the transmitter battery should be about 10.9 to 11.2 volts and the receiver battery (assuming it is a 4 cell unit) will be about 5.6 to 6.1 volts quickly falling to about 5.4 as you start to use it. In general, NiCads are quite robust, much better than NiMh and, if properly cared for will last for two to five years or more. Always charge any Nixx battery at a low rate if it has been dormant for a month or more; that means charging at about 0.1C for 15 to 16 hours. That is the rate that most wall warts that come with a system charge at.
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Old 07-28-2012, 12:49 PM
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Default RE: Futaba 4YF Charging Way Too Long

thanx Rodney,,,
any suggestions or recommendations on volt meters? The best kind.
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Old 07-28-2012, 12:54 PM
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Default RE: Futaba 4YF Charging Way Too Long

thanx Rodney,,,
the charger is never on when I'm charging the Tx or Rx. Could you explain what you mean by:
"(Right off the charger the voltage of the transmitter battery should be about 10.9 to 11.2 volts and the receiver battery (assuming it is a 4 cell unit) will be about 5.6 to 6.1 volts quickly falling to about 5.4 as you start to use it.)"


any suggestions or recommendations on volt meters? The best kind.
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Old 07-28-2012, 01:29 PM
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Default RE: Futaba 4YF Charging Way Too Long

I've been charging my Futaba 4YF 4-Channel radio for the last 3 days.  
If those batteries weren't toast before, they are now.  Wall charger is for overnight only. 

Get a Triton or other good peak-detection charger.
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Old 07-28-2012, 11:58 PM
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Default RE: Futaba 4YF Charging Way Too Long

well Tx & Rx information does say 15 hours for a full charge, 5 hours quick charge. And if my memory serves me right, I thought in the past it took less than 15 hours.
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Old 07-29-2012, 12:07 PM
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Default RE: Futaba 4YF Charging Way Too Long



This is what happens when you don't fly for about a year...you forget how your Tx/Rx work.


Radio System FAQ

I don't understand the red and green battery LED's on my 4YF, how do I know when my batteries are charged and when they are getting low?[/i]

[/i]

Your batteries are sufficiently charged when the green LED comes on, on your transmitter. As you are using the transmitter BOTH LED's should be on steady. As your voltage gets low the red LED will start to blink as an indication that you need to charge.

[/i]

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Old 07-30-2012, 06:41 AM
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Default RE: Futaba 4YF Charging Way Too Long

Your batteries will last longer and give you more charge/discharge cycles if you use only the wall wart instead of a fast charger. More batteries are ruined by those using fast chargers than were ever damaged by a wall wart. As long as the current is near 0.1C (as most wall warts are) you will not hurt the batteries at all if you forget and leave them on for two or three days. One miss of the peak detection circuit with a fast charger and you risk permanent cell damage; and this happens occasionally. The only advantage a fast charger has is just that it is FAST , it is just harder on the battery and will cost some lifetime no matter how good it is. Now, these comments refer to Nixx batteries, not LiPo. LiFi or PB although Pb will also suffer greatly if charged to fast.
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Old 07-30-2012, 06:48 AM
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Default RE: Futaba 4YF Charging Way Too Long

Oh yes, what is a good volt meter? For general use by most RC/ers, most of the inexpensive VOM (volt-ohm-ampere meters) work very well. Harbor Freight has some for under $5 that will do well for simple voltage measurements and also give you the ability to measure resistance and current although the current limits are sometimes quite low. I think you can find similar ones in most hardware stores, Wall Mart etc. All these seem to be quite accurate, more than enough for our usage.
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Old 07-30-2012, 08:49 AM
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Default RE: Futaba 4YF Charging Way Too Long

Thanx Rodney, on both posts...
I like the phrase, wall wart, which is what I'm using. No fast charging system in my house.

I'll look into your suggestions about volt meters. Thanx dude.
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