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HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › DISCHARGE AND CHARGE BATTERIES (CYCLE)
11-24-2006 11:19 PM  11 years agoPost 1
solo

rrApprentice

San Antonio Tx, USA

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What is the correct way to discharge/charge a radio battery in a 9303. I have the stock battery 600mha (sucks.) What is a good battery replacement for this radio. I am using the TRITON charger but I lost my instruction sheet that came with the charger. Thanks.

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11-24-2006 11:47 PM  11 years agoPost 2
nivlek

rrProfessor

Norfolk England

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What is the correct way to discharge/charge a radio battery in a 9303
The easiest way would be to use the transmitter until the low batter warning comes on , then recharge the battery . If you choose to do it this way , I would firstly fly as per normal , then , with the tx aerial extended , leave it on at home until you hear the warning .
Or you could use your Triton to cycle the battery , but you may need to remove the battery from the tx (there may be a diode in the charge circuit of the tx) . I'm sure that the Triton manual must be downloadable somewhere .
A larger capacity transmitter battery should be easily found , anything upto 2700mAH sould be available in nimh cells , but then you would eaither need to recharge them with your Triton charger , or buy a tx wall cahrger with a higher output - trying to recharge a 2AH plus battery with a 60-70mAH wall charge would be like pissing in the wind .

At the end of the day , it gets dark .

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11-27-2006 02:28 PM  11 years agoPost 3
SubSailor

rrVeteran

Austin, TX.

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Hey Solo,
You can discharge the battery while it is in the radio with the 9303. I wouldn't leave your radio on to try and discharge it without removing the module or, as nivlek recommended, with the antenna extended. But to be honest, I wouldn't use the radio to discharge it period, why put the "wear & tear" on your electronics, instead use your Triton.

I have the Fromeco 2700 mah battery in mine and I really like it, darn thing seems like it will run forever. Can't seem to run it down so I do cycle it every once in a while just to keep her in top shape. Here is a link to the battery I have in my 9303: http://www.fromeco.org/Shop/shopdis...ansmitter+Packs

On that battery I discharged it at 1 amp then recharged it at 1 amp as well. Works well for me.

Fromeco Field Rep.
A day without sunshine is, well.., alot like night time.

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11-30-2006 06:08 AM  11 years agoPost 4
Two Left Thumbs

rrKey Veteran

Houston, Texas - USA

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Safest to remove the pack from the Tx to cycle it.

Set your Triton to discharge at 200mAh, and charge at 60mAh for 14 hours. You can use the wall charger to charge, if the Triton cannot be set that low.

I have it on authority from a Horizon tech that it is safe to charge through the 9303 Tx charge port up to 3A (the fuse rating), or to be safe 2.5A. I'm not sure if you can discharge through that port, but according to SubSailor it is OK.

Another source for extended Tx packs is Hangtimes

BTW I find the stock JR battery to be pretty good, given its rating. Give it a bump at the field for a few minutes between flights, and you will be able to fly for 3 hours or more.

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11-30-2006 01:14 PM  11 years agoPost 5
dkshema

rrMaster

Cedar Rapids, IA

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[quote]What is the correct way to discharge/charge a radio battery in a 9303.[/url]

Get the manual for your Triton, read it, and use it:

http://www.electrifly.com/manuals/g...manual-v1_1.pdf

Set the end of discharge voltage at either 1 or 1.1 volts per cell (that would be 8 or 8.8 volts for the TX pack). A discharge current of 300 ma works pretty well for 600 mah nicads.

Select a reasonable charge current -- somewhere between 60 ma and 300 ma would be reasonable. If you're using the Triton, it's just downright silly to use it as your wall wart and charge the battery pack at 0.1C the 60 ma/10 hour charge route). Since nicads are a relatively safe battery chemistry (you really have to abuse them before they get "dangerous", there's no reason to remove them from your transmitter. Nicads generally don't explode or catch fire as LiPo cells when abused. If you pump too much current into them for too long a time, the built-in vent in the cells usually pops open to vent the excess gas that's being generated by the overcharge. You can kill the pack that way, but most likely your TX won't go up in a ball of flames.

Start the cycle, and be patient.

Cycling is not something you need to do on a particularly regular basis. If you do it often, you're simply reducing their overall useful life. Nicads have a finite life based on the number of charge/discharge cyles they see. I'll usually cycle my packs at the beginning of the flying season, and at the end. If a pack starts looking sick in -between, I'll check it.

Dave

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