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Old Mar 10, 2014, 11:48 PM
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I just ordered one of these. Supposed to arrive tomorrow. I am SO EXICTED. And disappointed in myself I took so long to get one these. They look truly amazing.

I got the SUV, of course. I love that it looks more like a real car. And the SUV design makes it seem even smaller, IMO (because SUVs are bigger)
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Old Apr 03, 2014, 06:08 PM
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Soooo I think after years of enjoying micro rc toys I think I finally learned my lesson on storing lipos fully charged. Today I discovered I might have a couple $100 in useless batteries :-/ I haven't been able to used them in a long time and always used to store them fully charged. I guess I used them enough in the last that it never was an issue. I ordered a decent charger for the first time and I'll have to all my batteries :-(

So this got me thinking: With a truck like this - with a built in lipo - should it be run to 50% battery if it's going to be sitting for more then a day or two?
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Old Apr 03, 2014, 06:25 PM
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Saskatoon, Canada
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Quote:
Originally Posted by telos81 View Post
Soooo I think after years of enjoying micro rc toys I think I finally learned my lesson on storing lipos fully charged. Today I discovered I might have a couple $100 in useless batteries :-/ I haven't been able to used them in a long time and always used to store them fully charged. I guess I used them enough in the last that it never was an issue. I ordered a decent charger for the first time and I'll have to all my batteries :-(

So this got me thinking: With a truck like this - with a built in lipo - should it be run to 50% battery if it's going to be sitting for more then a day or two?
I don't see the reasoning/rationale for doing that.

Why would that help? Why do you select 50%? What voltage is 50%

Cells can go bad for many reasons - sometimes from failed cell chemistry, sometimes from leakage due to a low volt protect circuit designed in China instead of America, sometimes due to other factors.
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Old Apr 03, 2014, 06:28 PM
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Originally Posted by Plantraco View Post
I don't see the reasoning/rationale for doing that.

Why would that help? Why do you select 50%? What voltage is 50%

Cells can go bad for many reasons - sometimes from failed cell chemistry, sometimes from leakage due to a low volt protect circuit designed in China instead of America, sometimes due to other factors.
The "rule of thumb" I've been seeing is that lipos shouldn't be stored fully charged - around 4.2V/cell. They should be stored around 50-60% charged. Or 3.85V/cell
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Old Apr 03, 2014, 06:38 PM
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Originally Posted by telos81 View Post
The "rule of thumb" I've been seeing is that lipos shouldn't be stored fully charged - around 4.2V/cell. They should be stored around 50-60% charged. Or 3.85V/cell
If you connect a bare lipo cell to a circuit the nominal voltage of a fully charged cell will be around 3.9V. Google up Nominal Voltage, it's kinda tricky, and I know what you are saying now.

Yeah, store after fully charging = 3.9V - that's what the factory that makes it does.
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Old Apr 03, 2014, 06:58 PM
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Originally Posted by Plantraco View Post
If you connect a bare lipo cell to a circuit the nominal voltage of a fully charged cell will be around 3.9V. Google up Nominal Voltage, it's kinda tricky, and I know what you are saying now.

Yeah, store after fully charging = 3.9V - that's what the factory that makes it does.
Sounds good! I won't worry about my little ultra micro too much :-)
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Old Apr 03, 2014, 11:39 PM
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Originally Posted by telos81 View Post
Sounds good! I won't worry about my little ultra micro too much :-)
Yah,

Lipo's hold their voltage well in storage, but shelf life might only be 2 years sometimes, so if a toy maker uses surplus cells from SEG market, you might even get less shelf life. Sometimes cheap cells could be old stock. Some brands I would trust more than others too.
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Old Apr 10, 2014, 10:34 PM
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Joined Apr 2014
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Hello, I have a question
micro small gears in car
Why were made of plastic?
Why were not metal ?
Thank you in advance
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