Dual LiFe set-up
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Dual LiFe set-up
I currently use two NiMh (1400mha) batteries with two switches in parallel for my 50cc set up.
One battery went bad and I'd like to upgrade to dual LiFe
Can I just simply replace my NiMh batteries with two LiFe batteries and run them in parallel?
I know voltage on LiFe stay constant a lot longer than on NiMh, that makes me think both LiFe will fight each other stronger which may lead faster batteries discharge.
Thank you,
Pashka
One battery went bad and I'd like to upgrade to dual LiFe
Can I just simply replace my NiMh batteries with two LiFe batteries and run them in parallel?
I know voltage on LiFe stay constant a lot longer than on NiMh, that makes me think both LiFe will fight each other stronger which may lead faster batteries discharge.
Thank you,
Pashka
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RE: Dual LiFe set-up
What do you guys think about TH - Hobbico LiFe 6.6V 2100mAh 10C Rx LiFeSource - battery?
It is not A123, but still the same LiFe technology, right?
They are rated 10C - should be plenty.
Does anyone have any experience with them?
Thanks again,
Pashka.
It is not A123, but still the same LiFe technology, right?
They are rated 10C - should be plenty.
Does anyone have any experience with them?
Thanks again,
Pashka.
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RE: Dual LiFe set-up
On a 50cc airplane, I would go with 2 1100mA A123. I would think the LIFE would be OK, but they do not have the quality or the discharge capability of a true A123
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RE: Dual LiFe set-up
ORIGINAL: Pashka_22
I currently use two NiMh (1400mha) batteries with two switches in parallel for my 50cc set up.
One battery went bad and I'd like to upgrade to dual LiFe
Can I just simply replace my NiMh batteries with two LiFe batteries and run them in parallel?
I know voltage on LiFe stay constant a lot longer than on NiMh, that makes me think both LiFe will fight each other stronger which may lead faster batteries discharge.
Thank you,
Pashka
I currently use two NiMh (1400mha) batteries with two switches in parallel for my 50cc set up.
One battery went bad and I'd like to upgrade to dual LiFe
Can I just simply replace my NiMh batteries with two LiFe batteries and run them in parallel?
I know voltage on LiFe stay constant a lot longer than on NiMh, that makes me think both LiFe will fight each other stronger which may lead faster batteries discharge.
Thank you,
Pashka
How do you figure that both packs will fight each other and discharge quicker? This simply cannot happen.
I use only true 2300mAh A123's so cannot comment on the other types. What I do on 50cc A/C is to wire the packs to support 2 switches. This is done because switch failure is more likely than cell failure.
Bliksem
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RE: Dual LiFe set-up
rcairflr,
Thank you.
Bliksem,
On my set up right now, one battery is almost dead. I can monitor voltage on the receiver. And since I have two switches - monitor both batteries. When both of them on - voltage is in middle of the "green" zone. With only "bad" battery it is in deep "red" zone, and with "good" battery it is in "upper green" zone.
That tells me that "bad" battery is drawing power from "good" one. When both batteries were good - they used to discharge in very close manner.
So, basically in my set up "good" battery discharging quicker than it would if would only use one "good" battery on its own.
Pashka
Thank you.
Bliksem,
On my set up right now, one battery is almost dead. I can monitor voltage on the receiver. And since I have two switches - monitor both batteries. When both of them on - voltage is in middle of the "green" zone. With only "bad" battery it is in deep "red" zone, and with "good" battery it is in "upper green" zone.
That tells me that "bad" battery is drawing power from "good" one. When both batteries were good - they used to discharge in very close manner.
So, basically in my set up "good" battery discharging quicker than it would if would only use one "good" battery on its own.
Pashka
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RE: Dual LiFe set-up
ORIGINAL: Pashka_22
rcairflr,
Thank you.
Bliksem,
On my set up right now, one battery is almost dead. I can monitor voltage on the receiver. And since I have two switches - monitor both batteries. When both of them on - voltage is in middle of the "green" zone. With only "bad" battery it is in deep "red" zone, and with "good" battery it is in "upper green" zone.
That tells me that "bad" battery is drawing power from "good" one. When both batteries were good - they used to discharge in very close manner.
So, basically in my set up "good" battery discharging quicker than it would if would only use one "good" battery on its own.
Pashka
rcairflr,
Thank you.
Bliksem,
On my set up right now, one battery is almost dead. I can monitor voltage on the receiver. And since I have two switches - monitor both batteries. When both of them on - voltage is in middle of the "green" zone. With only "bad" battery it is in deep "red" zone, and with "good" battery it is in "upper green" zone.
That tells me that "bad" battery is drawing power from "good" one. When both batteries were good - they used to discharge in very close manner.
So, basically in my set up "good" battery discharging quicker than it would if would only use one "good" battery on its own.
Pashka
OK, so you have a battery pack that has gone bad. This bad pack is causing the drain of the other. It does not mean that using dual packs are inherently bad or unsafe. Many flyers have been, and are still using this simple insurance.
That you are monitoring pack condition is a good thing. Dual pack safe functioning, as well as single ones, are dependent upon good battery management. I personally use 2 indentical chargers when charging dual packs. I monitor that the charges cut off close to each other as large differences are an early indication of pack problems. I stopped using dual NiMH packs as I experienced early mortality using this chemistry. I switched back to NiCd before I switched to A123 a year ago.
I have tried every abusive practice on these cells and they have survived where other chemistries would already have failed. To see how I make up my packs visit this page: http://bliksemseplek.com/a123.html4
There are other pics on my site so you can see that I take this obsession seriously. I have not had any crashes due to electrical failures in more than 10 years. Prior to this I used single switches & packs and did loose a few due to power failures. Unintended free flight blows.
Bliksem