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HomeRC & Power✈️Aircraft🚁HelicopterRadio - Mikado VBAR Control System › vcontrol - unhappy with vcontrol battery?
03-14-2016 10:17 PM  4 years ago
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readytofly

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tuvalu

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vcontrol - unhappy with vcontrol battery?
hi,
my vcontrol battery drops very quickly. faster than any other battery in any other radio i've ever had.
is someone experiencing the same problem?
thanks.
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03-14-2016 10:22 PM  4 years ago
cudaboy_71

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sacramento, ca, u.s.

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I had thought about this before, too. But, not enough to ask about it until now. I usually just top up my radio before heading out for the day.

But, I *think* you're used to seeing a voltage graph. VControl shows a % of battery. On my JR and Spektrum I'm used to panicking when the battery bar gets to the LVC, which looks about like the 70% mark--because it's showing from 0VDC up to fully charged.

With Vcontrol I think the radio might be graduated so that LVC is at 0%.

I may drop a line to the boys in Germany and see what they say.
if it ain't broke, break it.
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03-15-2016 01:47 AM  4 years ago
readytofly

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tuvalu

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dropping them a line would be a good idea since i'm a frequent inquirer in that forum. i don't think a battery can be drained to 0%. besides, it goes down very quickly, way faster than any other radio i've ever had. please let me know what you learned from mikado.
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03-15-2016 01:55 AM  4 years ago
newbheliusr

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I Put a second battery in mine. There's a connector inside for it, and the it lasts a lot longer.
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03-15-2016 10:57 AM  4 years ago
readytofly

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tuvalu

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hi,
Which brand and specs, please ?
How long between charges now ?
Thanks
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03-15-2016 04:26 PM  4 years ago
cudaboy_71

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sacramento, ca, u.s.

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I did hear back from Uli on the other board. As I figured, Vcontrol shows a percentage of usable voltage vs. JR/Spektrum's entire battery voltage bar--which includes the unusable voltage.

In the photo of a JR 9303 below you can see a little vertical tick mark just past the 1/2 way point of the voltage indicator (It's hard to see--just above the letter N in the [NRM] indicator. Anyone who has ever accidentally flown to that point knows that the transmitter will emit a warning tone, and will completely shut down in less than 10 seconds (hardly enough time for a safe auto)

Since the Vcontrol's percentage meter is really indicative of the usable portion of the battery, 0-100% of the Vcontrol battery bar indicates a much more conservative range than JR/Spektrum's usable voltage mark. If you read Uli's response below, you'll see that Vcontrol provides a warning tone at 15% remaining. But, this still provides 1.5 hours of safe usable time. And, even once it reaches zero percent there is an hour of usable voltage remaining--even though you may be damaging the cell chemistry.

In short, it may *seem* like the Vcontrol's battery depletes quicker than other transmitters. However, I think it is just an illusion based on how we've been used to monitoring other radio's charge.

I hope this puts your mind at ease.

Here is Uli's response verbatim:
The percentage is based on the usable voltage range of the battery. So at 0% it has the designed empty voltage of 3.5V. The Battery is not flat at this level and has about one hour runtime. But it starts to damage the chemistry slightly.

The Warning starts at 15% level, which is about 1,5h before the 0% state.

If you start a flight when the warning is already on, it is no problem. But the permanent warn sound will probably be not pleasent during the flight

If connected, the transmitter will not shutdown on low voltage. The Idea is, that its better to damage the battery a bit, rather than crash the model. If not connected, it shuts down at 0% gracefully.
if it ain't broke, break it.
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03-15-2016 05:38 PM  4 years ago
hemp

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Portland, OR - US

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The VControl battery lasts "forever". At least that's how it seems. In reality it'll last most people at least a solid week of flying. As stated, you don't have to charge it when it hits 50% -- you can run it nearly to zero, though most people will want some buffer to not risk damaging the pack, you can easily finish a flight with the meter reading zero because the pack still has plenty of voltage to operate and the radio will not shut itself off when a model is connected.

I added a second battery mostly because I wanted the extra weight, but it's also pretty cool to have a radio that I never have to think about when I'm flying. I charge it every once in a while when I notice it's starting to get below 50%, or if I'm heading out for a fun fly, but I never worry about it.

Oh, do consider decreasing the screen's brightness. That will impact how long the battery lasts.

Team MikadoUSA
Revolectrix Ambassador
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HomeRC & Power✈️Aircraft🚁HelicopterRadio - Mikado VBAR Control System › vcontrol - unhappy with vcontrol battery?
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