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HomeRC & Power✈️Aircraft🚁HelicopterRadio - JR DMSS › Lithium Battery Life
02-02-2020 04:51 PM  5 months ago
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Blue Angel

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Redford, Mi - USA

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Lithium Battery Life
Anybody know how long these batteries last or how often they should be replaced? My understanding has been that if the main battery is properly maintained and charged, it will maintain the Lithium battery. Does anyone know if my statement is correct? I can say that I have three older JR transmitters (2-10X and 1-10SX) that have never had this battery changed. The 10SX is approximately 30 years old. They all are still going strong. Any comments? Thanks!

Blue Angel
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02-02-2020 06:00 PM  5 months ago
Rojoalfa

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Punta de Mata, Monagas-Venezuela

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Well, battery life depends of different efects... But, installed on your radio, we can make some calculations to see what happens...

Time = (capacity x 70%)/(consumption radio in mAH)

So, if you have a 2500 mAH lithium battery and a transmitter that use 200 mAH for each hour...

Time = (2500 x 0.7) / 200

8 hours...

If you fly 15 min each time... That means 32 flights per charge.
At the end, battery remain with 30% of charge, ready to charge again.

A lipo battery on this procedure can live more than 300 cycles... Or even more...

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Saludos cordiales,
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02-02-2020 06:32 PM  5 months ago
Rojoalfa

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NiCD or NiMH are good batteries, for sure.
If you like to charge every gadget you have prior to fly, there is no better battery than NiCD or NiMH.
In my case, I prefer not to spend my time charging batteries, That is why I use lipo batteries on my gadgets.
Every time I go to fly, I take some time testing voltage on my packs. By the time it reaches 30%, it is time to charge again.
Of course, I maintain records of this performance for each gadget that I fly.

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Saludos cordiales,
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02-02-2020 08:17 PM  5 months ago
dschertz

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Jackson, MI

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I believe he is talking about the memory battery in the radio, not the transmitter battery that gets recharged for use. Correct me if I'm wrong.
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02-02-2020 11:38 PM  5 months ago
Badgerfarm

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Missouri

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I agree, George was asking about the backup battery.
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02-03-2020 01:20 PM  5 months ago
Rojoalfa

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Punta de Mata, Monagas-Venezuela

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Lithium battery backup...

Most of the time, lithium battery life expectation is more than radio life span...

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Saludos cordiales,
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02-03-2020 03:53 PM  5 months ago
JuanRodriguez

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The Villages, Florida

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Badgerfarm I agree, George was asking about the backup battery.
Typically, 5 yrs was the rule of thumb we used ....
Been there, done that and old enough to know better.....
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02-03-2020 05:15 PM  5 months ago
Blue Angel

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Redford, Mi - USA

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Everybody: Yes, I am referring to the small internal circular battery that controls the data on the " touch screen". I thought I made it clear, but I guess not. My concern is whether it needs replacing or should I keep using it as is? If I should replace it, where do I send it.......Horizon Hobby??? Please advise. Thanks!

Blue Angel
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02-03-2020 05:43 PM  5 months ago
Blue Angel

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Redford, Mi - USA

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Rajoalfa: I was referring to the "Li" data battery for the touch screen. For the main battery I use "nickel metal hydride....enoloops". Seem to hold a charge forever. I will not use LiPo's due to the obvious risks involved. Sooner or later I would become careless and cause a fire.

Blue Angel
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02-03-2020 07:10 PM  5 months ago
Rojoalfa

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Yes. We understand your question.

Well, you are talking about the little cell inside our radios to keep memory and other functions...

IMO, by the time it fail, you do the replacement.

Rule of thumb.
If Your transmitter don't mess with you, you don't mess with your transmitter.

Replace cell only if it fails.

Futaba and other gadgets, it is easy to replace that little cell.

For Spektrum?... I don't know. It is not as easy.
Some technician is required.
If you disconnect that little cell, your spektrum transmitter may become inoperative.

/
Saludos cordiales,
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