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Li-Po Batteries For H0 Locomotives ?
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 Posted: Tue Nov 26th, 2013 04:41 pm
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Dieter. D
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Hello,

My only problem with R.C. :

I have a Transmitter and Receiver of David T ( DelTang ) all the best.
For one locomotive for testing.
More to come later ...

Unfortunately, the H0 locomotives are so very small.
I do not want a ghost-car, but want to try to fit everything in the locomotive.
Currently I have tentatively 4 batteries AAA Eneeloop in operation.
So 4.8 Volts.
This is very good, but the case does not fit on it.

In tests with a cellphone battery with 3.7 Volts to me the speed appeared too slow, especially with gradients.
So more Volts.

Now I would have 2 mini LiPo batteries connected in series, then I have 7.4 Volts.
Actually too much again !

I had read somewhere that there is a booster that increases the Voltage, but cannot find anything about this ?

I would also like to leave the batteries, during charging, in the locomotive.
How can I make the most electric, without ever removing the locomotive body ?

However, I have seen, according to reports on the Internet, people are still afraid of those things, like fire-hazard etc.
You've probably had experience ?
I do not want to burn me or the loco !

Bruno ( chordially ) posted me the following

http://freerails.com/view_post.php?post_id=62767

But only 70 mAh ?
Is that enough ?
The dimensions are good.
What power is consumed in an H0 locomotive ?

I have found in Germany this store, which has a lot ?

http://shop.lipopower.de/Akkus-Batterien

Would be very happy about reports.

Greetings

Dieter




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Dieter
My english is very bad:-( school English...
I must translate with Google.
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 Posted: Tue Nov 26th, 2013 05:43 pm
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Herb Kephart
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Dieter-

If you think that your English is bad, you should try my German!

The voltage increasing device is available here---http://www.s-cab.com/

Click on "Battery" at the top of the page.

That will tell you about the device, and also small battery available there.

The products there are of excellent quality, and are what I use.

Do not worry about too much voltage,  the radio will let you control that.

Also, get the correct charger, and charge on the lowest setting.

The fire danger is highly over stated if you do this.

It is only the aircraft and race car guys that want to get back into action, and charge quickly at a high setting on their chargers, tha might have this problem

I agree fully about not wanting a "ghost" car. First time that I have heard the car called that, but it's a good name.

Others, probably Woodie for one, will also probably answer also.

es besteht die Huffnung, dass wir Erfolg habben.

Herb



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 Posted: Tue Nov 26th, 2013 06:59 pm
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Robin2
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You might also look at the Hobby King website

http://www.hobbyking.com/hobbyking/store/index.asp

...R




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 Posted: Tue Nov 26th, 2013 08:58 pm
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wv railbaron
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Robin, try Pololu for step up voltage.

These are extremely small and connected to a 3.7 Volt 1 cell battery take up the minimum space possible for an install.

They have 7 Volt 9 Volt and 12 Volt step-ups available.

I received mine in about 3 days.

Steve S


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 Posted: Wed Nov 27th, 2013 06:56 am
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Robin2
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Hi Steve,

It's Dieter who is looking for the boosters.

...R



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 Posted: Wed Nov 27th, 2013 08:03 am
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davecttr
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Dieter

How much space do you have in your locomotive?
Once you have the dimensions you can decide what batteries might be suitable.
I can see from your image that you already have the Rx. installed, so you don't have to find space for it.

Your AAA batteries are 10mm x 45mm plus the battery holder,
which might be 50mm x 25mm x 12mm for 2 batteries, including the holder.

Your locomotive body won't fit so you need to look for batteries that are thinner than 10mm.
Would 6mm thick allow the body to fit?




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 Posted: Wed Nov 27th, 2013 09:10 am
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DavidT
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Dieter,

You can also solder the Eneloop cells together (with wire links between each cell).

Or get the 5v Pololu.

Regards, David.



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 Posted: Wed Nov 27th, 2013 11:04 am
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wv railbaron
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Dieter,

Losi has a NiMh battery that is smaller than 2 AAA batteries in the holder.

The battery is 4.8 Volts and 180mAh for less than 10 dollars.

lt should run for around 2 hours.

I have installed this battery in a Bachmann railtruck.

I would advise you to eliminate the use of battery boxes, because of their size.

Steve S


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 Posted: Wed Nov 27th, 2013 03:04 pm
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W C Greene
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When I started my "r/c adventure",
I had the luxury of being employed at a hobby shop which sold r/c equipment and one of my buddies is an r/c jet flyer.
This helped me along with my obsession.
I know that most will have to search out proper batteries on the net.
I am able to go to a store and actually see what will fit and buy it.
I have taken my locos to the LHS and checked out sizes, etc. while the amused staff watched and offered their advice...good or bad.
Herb is right, do not be afraid of LiPo batteries, they only explode when mistreated (like many ladies).
I have some in my locos that are 10 years old and work like new after many, many charges.
I don't know of any "guide" about battery sizes for specific locos.
Something you might consider is making "mock ups" of certain batteries from balsa wood using the known dimensions available,
and then see if there is room to install them in your locos.
It will take "creative cramming" to accomplish this sometimes,
and you may have to forgo such things as cab interior details in favor of batteries and boards.
But I must comment that I would rather have a beautifully performing r/c loco with a battery in the cab,
than a beautifully detailed cab interior of a loco that balks on dirty track and wheels.

Woodie




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 Posted: Wed Nov 27th, 2013 05:42 pm
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Dieter. D
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First of all thanks for your numerous replies.

Great forum here.

Give me the next few days to read carefully and respond.

Joyful greetings

Dieter




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Dieter
My english is very bad:-( school English...
I must translate with Google.
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