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› Battery/Charger problem PLEASE HELP
09-18-2017 04:40 PM  14 months agoPost 1
3d-wanna-b

rrApprentice

Strawberry, Ar. U.S.A

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I built a 1s2p 3.7v 4400 pack out of 2 2200 mAh cells for my transmitter. I'm having problems charging it for some reason, as of now when I put it back in my radio its so low it will try to power the radio on but shuts itself off in just a couple sec.I go to charge it and I set my charger for 1s, 3.7v, 4400 and it will charge for about 2 seconds and show 3.8 to 3.9v and charge ends. I just checked it with my volt meter and it showed 3.75v but like I say wont power the radio up and wont charge.. SO, what am I or what did I do wrong???

<<Beating the air into submission!!!>>

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09-18-2017 05:34 PM  14 months agoPost 2
Pistol Pete

rrProfessor

Seffner, FL

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Which Radio?

What is its original power requirements?

OR

Did it always use only one cell before you double your milliamp capacity? If it did, the problem is your new 1S2P configuration.

If you have another one good cell, test radio to ensure it still works with its original power requirement.

If you dont have a spare good cell, you're going to have to disassemble your 1S2P to test with each battery separately.

~~Enjoying the hobby one flight at a time~~

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09-18-2017 06:49 PM  14 months agoPost 3
3d-wanna-b

rrApprentice

Strawberry, Ar. U.S.A

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Hi Pete, thanks for the reply.. Radio is a Turnigy TGY i-10 and yes it always used a 1s 1700mAh lipo. I got tired how fast it run down so decided to use a couple cells out of an old 3s pack.So I assembled them as a 1s2p 3.7v 4400mAh pack I soldered + to + and - to -. I just took the pack apart and checked both cells and they both read right around 3.5v each??

<<Beating the air into submission!!!>>

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09-18-2017 07:52 PM  14 months agoPost 4
pctomlin

rrVeteran

Texas

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Don't know what charger you are using, a LiPo cell at full charge is 4.2V. If you are selecting 3.7V as the stop charge voltage this is why your charger immediately shuts off.

If your cells are "hard wired" together as a 1S configuration this can be dangerous when charging because one cell could get overcharged. I would set up your receiver pack to be 1S2P with a harness that connects to transmitter power.

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09-18-2017 08:06 PM  14 months agoPost 5
3d-wanna-b

rrApprentice

Strawberry, Ar. U.S.A

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Charger is a Triton 2 EQ. As for the stop charge voltage i have no option for this. my options are battery type, mAh size, and voltage lowest is 3.7 then it goes up to 7.4 and so on.. image shows original battery and the one i made..

<<Beating the air into submission!!!>>

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09-18-2017 10:37 PM  13 months agoPost 6
Dan Minick

rrKey Veteran

Columbus, WI

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How old was the donor battery? Was it known to to work? I would try putting some sort of load on the pack other than your radio and see if it will run. Voltage is one thing, any sort of capacity and ability to hold the voltage is another

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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09-19-2017 12:00 AM  13 months agoPost 7
pctomlin

rrVeteran

Texas

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Are the 2200 mah cells Li-Ion or LiPo? The battery out of the transmitter is Li-Ion. Both would have an end charge voltage of 4.2V, just a little difference in curve/nominal voltage.

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09-19-2017 12:57 AM  13 months agoPost 8
Pistol Pete

rrProfessor

Seffner, FL

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A 3.5V reading is not fully charged as mentioned.

Check Triton settings.

Are you getting the 10 second "melody or tones" that charge is complete?

That charger has many built in safety features of which two (2) may be terminating the charge prematurely.

One is a "safety timer" which should be set to 60 minutes
(based on charging at 1C) Bad out of balance batteries will require longer times.

Second is a "maximum charge capacity" which should be battery capacity.
(4000mAh)

If you are not getting an error on screen, I suspect the second setting.

I still have the first triton and had similar "programming" issues.

~~Enjoying the hobby one flight at a time~~

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09-19-2017 04:12 AM  13 months agoPost 9
3d-wanna-b

rrApprentice

Strawberry, Ar. U.S.A

My Posts: All  Forum  Topic

I'm gonna say its gonna be the charger.. I charged the battery through the radio and all went fine except the 5 - 6 hour charge time anyone recommend a good charger that will charge multiple packs at the same time and still not break the bank??

<<Beating the air into submission!!!>>

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09-19-2017 04:37 AM  13 months agoPost 10
Dawiev

rrApprentice

Middle East

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.......a good charger that will charge multiple packs at the same time and still not break the bank
Sounds like a holy grail quest !!

After a few "good, but affordable" chargers that didn't work too well after some time, I bought a Powerlab 6 and the required parallel charge boards. A number of years now without any issues.

At the time they did not have the GT range. It is what I would go for today. http://www.revolectrix.com

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09-19-2017 12:32 PM  13 months agoPost 11
Dan Minick

rrKey Veteran

Columbus, WI

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My last setup was as pair of Thunder Power 820CD chargers. They worked great and can be found pretty cheap, only reason I switched was for more wattage for 7s packs.

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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09-20-2017 02:06 AM  13 months agoPost 12
R/C Speed Nut

rrVeteran

Galesburg, Michigan USA

My Posts: All  Forum  Topic

.......a good charger that will charge multiple packs at the same time and still not break the bank
Affordability is relative to your financial situation, but I have had good luck with the Turnigy Reaktor Quadkore four port charger from Hobby King. It is capable of 300 watts per port for a total of 1200 watts. ~$220


Mike

Funky Chicken?!!..........I thought this was how you do a piro flip!!

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09-20-2017 03:20 AM  13 months agoPost 13
pctomlin

rrVeteran

Texas

My Posts: All  Forum  Topic

As stated above FMA makes a fine line of charging equipment that is well worth the investment. They have taken a lot of time to build in the necessary safety protocol into the charger firmware. I personally use a pair of PL8 chargers set up with a Bump Controller as the interface all housed in a Seahorse case.

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