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Old 02-19-2017, 03:49 PM   #1
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Default 1/12 T-Bar cars with 1s saddle packs

So I pulled out my serpent s120 this weekend and found that is still fun (of course it is) so i was looking at how i could fit a 1s lipo in it in order to go racing

Of course a standard 1s brick will not fit whatsoever without compromising balance.
There used to be a 1s saddle specifically for 12th scale cars but i cant find them right now.

But what if you take a 2s saddle pack and instead of wiring the two packs in series, you just connect them in parallel?
Then you'd have 3.7V....kinda like a pseudo 1S saddle LiPo.

Anybody tried that before?

Last edited by Obstsalat; 02-19-2017 at 04:38 PM.
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Old 02-19-2017, 06:35 PM   #2
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1s2p is a common thing.
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Old 02-19-2017, 08:50 PM   #3
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Check the size, from what I've read before those 2s packs are much taller which makes fitting the body more difficult. Speedzone is who made the 1s saddle pack before, you might want to check with them and see if they still have any.
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Old 02-19-2017, 09:48 PM   #4
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Quote:
Originally Posted by Obstsalat View Post

But what if you take a 2s saddle pack and instead of wiring the two packs in series, you just connect them in parallel?
Then you'd have 3.7V....kinda like a pseudo 1S saddle LiPo.

Anybody tried that before?
That's exactly (not pseudo) what the old Speedzone 1s saddle pack was - 1s2p.
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Old 02-19-2017, 11:33 PM   #5
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Originally Posted by biz77 View Post
That's exactly (not pseudo) what the old Speedzone 1s saddle pack was - 1s2p.
Came here to post this!
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Old 02-20-2017, 06:37 AM   #6
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Check out this thread:

"Misfit" T-plate pan cars

Has some more info on t-plate cars.
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Old 02-20-2017, 07:01 AM   #7
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Quote:
That's exactly (not pseudo) what the old Speedzone 1s saddle pack was - 1s2p.
Thing is: 2S sadle packs are 1s3p....not 1s2p

Idk what those numbers stand for, but I'm pretty sure its not the same
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Old 02-20-2017, 07:46 AM   #8
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Quote:
Originally Posted by Obstsalat View Post
Thing is: 2S sadle packs are 1s3p....not 1s2p

Idk what those numbers stand for, but I'm pretty sure its not the same
Not really, they are 2 separate 1S packs with 4mm banana plugs. You can wire them parallel as 11,400mah @3.7V or series with 5700 mah @7.4V
http://www.genstattu.com/gens-ace-57...nana-plug.html
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Old 02-20-2017, 11:39 AM   #9
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Quote:
Originally Posted by Obstsalat View Post
Thing is: 2S sadle packs are 1s3p....not 1s2p

Idk what those numbers stand for, but I'm pretty sure its not the same
The S stands for series and the P for parallel. Wiring in series increases the voltage based on the number of cells. Wiring in parallel increases the capacity based on the number of cells.
For example you have 2 single cell LiPos of 3.7 volts nominal and 4,000 mAH each.

Parallel wiring:
Cell 1 Cell2
(+)--------(+) this is your positive
(-)---------(-) this is your negative

This will give you 3.7 volts nominal and 8,000 mAH of capacity. This is 1s2p.

Series wiring of the same cells:
Cell 1
(+)-----------------------------------------This is your positive
(-)-------(+) Positive of cell 2
(-)--------------------------------This is your negative
Cell 2
This will give you 7.4 volts nominal and 4,000 mAH of capacity. This is 2s1p.

The 3P indicates 3 cells in parallel to get the capacity required. It could be a 1p, 2p, 3p etc. The voltage will stay the same.

Last edited by biz77; 02-20-2017 at 12:13 PM.
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Old 02-20-2017, 12:49 PM   #10
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Quote:
Originally Posted by biz77 View Post
The S stands for series and the P for parallel. Wiring in series increases the voltage based on the number of cells. Wiring in parallel increases the capacity based on the number of cells.
For example you have 2 single cell LiPos of 3.7 volts nominal and 4,000 mAH each.

Parallel wiring:
Cell 1 Cell2
(+)--------(+) this is your positive
(-)---------(-) this is your negative

This will give you 3.7 volts nominal and 8,000 mAH of capacity. This is 1s2p.

Series wiring of the same cells:
Cell 1
(+)-----------------------------------------This is your positive
(-)-------(+) Positive of cell 2
(-)--------------------------------This is your negative
Cell 2
This will give you 7.4 volts nominal and 4,000 mAH of capacity. This is 2s1p.

The 3P indicates 3 cells in parallel to get the capacity required. It could be a 1p, 2p, 3p etc. The voltage will stay the same.


oh I see. So if the 2S saddle pack lipo says: 2x 3.7V 1s3p that means each block consists of 3 batteries in order to get the 5600mah, but each block still has only 3.7V
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Old 02-20-2017, 12:51 PM   #11
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To the OP

Speedzone 1S Pro 5200 mAh 3.7v 50C Saddle Lipo [SZ5200PROSD1S] - $59.95


I used these in my 12L4
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Old 02-20-2017, 12:56 PM   #12
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not available in germany :/ they dont have a distributor in the EU..now that the UK left us
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Old 02-20-2017, 12:59 PM   #13
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Quote:
Originally Posted by Obstsalat View Post
not available in germany :/ they dont have a distributor in the EU..now that the UK left us
That sucks.....
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Old 02-20-2017, 01:18 PM   #14
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Originally Posted by Obstsalat View Post
oh I see. So if the 2S saddle pack lipo says: 2x 3.7V 1s3p that means each block consists of 3 batteries in order to get the 5600mah, but each block still has only 3.7V
Yep! Each hard case would contain 3 individual cells wired in parallel for the total capacity. In your case 5,600mah. That means each individual cell inside the case would be 5,600/3 = ~1867mah. You wire two of those together in series to get a 2s3p of 7.4 nominal volts with 5,600 mah of capacity.
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Old 02-23-2017, 10:54 AM   #15
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Quote:
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I'm interested how you mounted the batteries since the chassis has large battery slots for the inserts.
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