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Fetch modellers - model cars, trains, lego, meccano, airfix etc. :-)

2 lurkers | 24 watchers
HappyG(rrr)
HappyG(rrr)
Sep 2021
12:55pm, 27 Sep 2021
39,814 posts
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HappyG(rrr)
This shape? modelsport.co.uk
HappyG(rrr)
HappyG(rrr)
Sep 2021
1:01pm, 27 Sep 2021
39,815 posts
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HappyG(rrr)
Ah no, quite stubby ones

makeitbuildit.co.uk

Yeah, 1700mAh is most I could find, I think. Shame. Surprised they only last 10 mins. Just need to get more of them and faster charger, like you are doing. :-) G
larkim
larkim
Sep 2021
1:32pm, 27 Sep 2021
15,527 posts
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larkim
Yes, saw that one earlier too. As you say, 3000mAh for 30 minutes, so 1200 for about 10 feels about right.

I may invest in a better charger though, at the moment it is pretty much a dumb charger so I've no real awareness of whether I'm harming the battery via the charger or not.
HappyG(rrr)
HappyG(rrr)
Sep 2021
1:43pm, 27 Sep 2021
39,816 posts
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HappyG(rrr)
The smart one I linked to is AC I think - careful as some of them are DC and require a separate power supply (lots of stuff is 12V DC based, because things were powered from car battery and leisure battery sources). Some of them can do 2 batteries at same time, so even if it takes 30 mins, have 3 on rotation and I think you'd have continuous power?! :-) G
HappyG(rrr)
HappyG(rrr)
Sep 2021
1:45pm, 27 Sep 2021
39,817 posts
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HappyG(rrr)
Shame you can get 10,000mAh now for LiPo. My 5800mAh never run out basically! :-) G
larkim
larkim
Sep 2021
1:46pm, 27 Sep 2021
15,528 posts
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larkim
What do these things mean?
LiPo/LiFe/LiHV/LiIon: 2-4S

NiMH/NiCd: 6-8S

The numbers at the end in particular (I know the rest is the battery type!)
HappyG(rrr)
HappyG(rrr)
Sep 2021
1:55pm, 27 Sep 2021
39,818 posts
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HappyG(rrr)
2S is 2 cells (why S? I dunno. S for Cell, errr.) Individual battery within the pack.

My LiPos are 2S, each 3.7V so 7.4V.

A NiMH 6S is probably 6 x 1.2V so 7.2V. (You can actually see the cells in some types of packs).

Motors and speed controllers will usually only be rated up to a certain "power", so 2S LiPo is often a limit for some ESCs. :-) G
HappyG(rrr)
HappyG(rrr)
Sep 2021
1:56pm, 27 Sep 2021
39,819 posts
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HappyG(rrr)
There's also a current rating, which is often how fast they can be charged, discharged and also peak current affects how fast the motor will go.
larkim
larkim
Sep 2021
1:57pm, 27 Sep 2021
15,530 posts
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larkim
Ta; so my pack is a 6S as you suggest. The car that is coming on Wednesday for son's birthday is a 2S LiPO but that only has 1000mAh capacity; though I did buy a spare so there's at least 2 there.

Smart charger seems a very sensible investment though.
HappyG(rrr)
HappyG(rrr)
Sep 2021
2:02pm, 27 Sep 2021
39,820 posts
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HappyG(rrr)
The charger at around that price point will do all types of battery - so I have NiMH, LiPo and LiFe batteries and it does all of them (you may need some connectors - just make up your own cables as adaptors). But probably only one at a time.

Remember for LiPo to get a Fire Retardant Charging Bag. LiPos can catch fire and it's a spectacular thing outdoors, but very scary and dangerous indoors. :-) G

About This Thread

Maintained by HappyG(rrr)
I can't believe that we've got Crafts, Gardening, Computer Games, but not model cars, trains...!

Just don't call them toys!

My particular hobby was 1/10th scale radio controlled car racing. I'm now looking to get into radio controlled planes. We have some Airfix model builders in here and Lego builders too. Any type of model vehicles really! Planes, trains, automobiles... boats, helicopters, anything! Come join in! :-) G
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