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HomeRC & Power✈️Aircraft🚁HelicopterRadio - Futaba FASST › How long does your 8FG std batt last ?
05-16-2012 02:54 AM  9 years ago
GetToDaChopper

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Shes up and running on my powerlab 6, cycling the stock tx battery for 3 cycles at your settings, thanks !    ▲
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05-16-2012 03:02 AM  9 years ago
Dood

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Why don't you take your transmitter to the field, turn it on, fly it until the battery is empty, then take it home and charge it on the wall charger?

Or do you like putting unnecessary wear & tear on your batteries in the form of meaningless cycles?
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05-16-2012 05:45 AM  9 years ago
GetToDaChopper

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i guess you missed this....
I cycled it after I noticed a severe loss in battery capacity.

I think I programmed my charger for 3 discharges/3 charges. It was like new on the next charge.
"using" is not the same as "cycling", but as always Dood you are more than welcome to "your" opinion even if not everybody shares it......

Criticism Disregarded......

P.S. ya know i bet you're a real hit at birthday parties, a regular laff a minute kind of guy.....
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05-16-2012 06:16 AM  9 years ago
Dood

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Discharging/ charging, even in a real-world setting, is STILL cycling.  ▲
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05-16-2012 06:21 AM  9 years ago
GetToDaChopper

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hell with 350.000 cycles that can be expected from most NiMh battery packs whats 3 cycles ??? i mean really Dood.......     ▲
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05-16-2012 03:11 PM  9 years ago
Four Stroker

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Atlanta

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Why don't you cycle the battery a few time to determine the actual capacity and then MEASURE the transmitter current draw.
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05-16-2012 08:32 PM  9 years ago
GetToDaChopper

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i'm all ready doing that as well at the same time

it's a stock 8FG 1700 mAh NiMh, first cycle, full battery, 1717 mAh out......
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05-16-2012 09:54 PM  9 years ago
Dood

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Why don't you cycle the battery a few time to determine the actual capacity and then MEASURE the transmitter current draw.
Or, you could save yourself the trouble and read what I posted back in February.


The 8FG draws 195mA with the backlight off and 224mA with the backlight on.
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05-16-2012 09:57 PM  9 years ago
Four Stroker

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Atlanta

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There you go. Already done. And the stock battery will obviously last long enough !
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05-16-2012 10:16 PM  9 years ago
Sam2b

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Tacoma, WA

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In theory if the battery cells are not stored fully charged they should last longer. That's if you aren't flying every 24-48 hours.

I fly only the weekends. I never charge my transmitter battery over night - only for 2-3 hours before I go fly for the day (6-8 flights). My power-on voltage is within 1 volt of "low voltage" and IMO is fine while flying under the clouds. I don't like the over night charge saturation - it makes the battery cells warm. Typically warm cells mean resistance (not good).

I always recommend to NOT fly unless you have toped off your battery by 2-3 hours minimum before your day of flying. If you have not flown for more than 1 week, a little more charge is wise. Of course, ensure the battery voltage is within the recommended voltage in the manual. (Lipos are a different story).
_Sam B_
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05-17-2012 03:38 AM  9 years ago
GetToDaChopper

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now that i see my battery has it's fully rated capacity i have stoped the cycling, there's no way to truly know the condition of your battery unless you test and now i know......
And the stock battery will obviously last long enough !
well long enough for what ? it all depents on what you plan on doing with it or how you plan on using it i would say......
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05-18-2012 02:30 AM  9 years ago
Dave Willis

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Sevierville, TN USA

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Problem Discharging and not cycling is you are bringing the batteries down too far. I think the cycler stops at 1.1 volts per cell. Not sure about Nimh, but Nicads, if brought down too low risked a chance of cell reversal. I called Sal at SR Batteries and he is building me a 2500ma Nimh pack that is supposed to fit in my 8FGH Super. Should be able to fly all day with no worries about the pack. Keeping up with cycling times will also alert you if there is a change in the pack capacity, Discharging will not. I was at the field and a Buddy crashed a Smith Mini Bipe, and couldn't figure out what happened, after only 2 flights. I asked if he knew the packs capacity and he replied "It's a 500ma pack". I asked if he had ever cycled the pack to check the capacity and he had no clue what I was talking about. I loaned him my cycler and the 500ma pack only had 280ma, hence the reason for the crash. I am able to tell the capacity of every pack I have, when they get down below 80% I throw them away.

Dave
Futaba AMA 6679 IRCHA 675 VHA 11
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05-18-2012 11:37 PM  9 years ago
GetToDaChopper

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+1 Dave, it's never a good idea to assume that the actual pack capacity matches what it says on the label, i think it is much better to KNOW what the pack capacity for the most part !     ▲
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05-19-2012 02:49 AM  9 years ago
Dave Willis

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Sevierville, TN USA

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GetToDaChopper
Have you ever heard of Indian Springs?

Dave
Futaba AMA 6679 IRCHA 675 VHA 11
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05-19-2012 07:05 AM  9 years ago
GetToDaChopper

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Las Vegas , NV

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nope never heard of it, lol

jk of course i have, you mean the prison i take it, why do you ask.....
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05-19-2012 12:04 PM  9 years ago
panzlflyer

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Goldsboro,NC,USA

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Gettodachopper is right.
It has always been the case that Nimh and Nicad packs need a formation charge/discharge x3 to get best performance. Using the transmitter to flatten them is not the best way to format them due to the uncertainties of cutoff voltage.
There is no way to really measure capacity to know if you got a bad pack from the factory using the transmitter.
T700,450Pro,Spirit Pro,Beast+, Qav 500,Futaba18SZ
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05-23-2012 04:38 AM  9 years ago
Neon Juripuri

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Peculiar Mo USA

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I'm cycling mine right now because of this thread. My 8FG is a year and a half old. I can tell the voltage is dropping faster than when it was new. I think I could have got 3 seasons though without cycling, judging from how it's been holding up. So if I can get 4 or 5 I'll be a happy camper. If nothing else it's making me really try to understand my charger
I would never put a Lipo in my TX. I have left the switch on too many times
Fred
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05-23-2012 01:14 PM  9 years ago
Dave Willis

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Sevierville, TN USA

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I didn't cycle my Pack when new. This week I cycled it 3 times and went from 1405ma to 1710 ma on the third cycle.

Dave
Futaba AMA 6679 IRCHA 675 VHA 11
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05-24-2012 03:17 AM  9 years ago
GetToDaChopper

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Las Vegas , NV

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all right ! that's great, it's back up to rated capacity and now you really "know" what the packs capacity is for sure !    ▲
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06-01-2012 11:40 PM  9 years ago
Dave Willis

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Sevierville, TN USA

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I got my Battery Pack from SR Batteries. It's a 6V 2150 ma that is the same size as the 1700 that comes with the TX and if fits in the Transmitter Perfectly. When I get it cycled I'll let you'll know the capacity. Should enable alot more flying time.

Dave
Futaba AMA 6679 IRCHA 675 VHA 11
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HomeRC & Power✈️Aircraft🚁HelicopterRadio - Futaba FASST › How long does your 8FG std batt last ?
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