What does the mode button on the controler 1 through 4 do?

I have 12428 but there's only a power switch and 2 knobs for steering and throttle. A friend also has the same transmitter although his car has plastic gears mine came with all metal gears. So I really don't know.

Can this be upgraded to last longer and go faster?

I upgraded the battery only and got a lot more torque and speed and battery time. I can get 30-40 mins easy using a 7.4 2000mah

Can I use a 7.4V 5000 mAh battery in it?

I use a 7.4v 2000 and it makes me a tad uncomfortable because it heats up however it doesn’t go into thermal protection (if it even has one). I get a good half hour out of that. Because it gets so hot I’d personally say maybe use a smaller one.

ASIN	B07XJ2Z5CJ
Additional Features	Portable
Age Range Description	Kid
Are Batteries Required	Yes
Batteries are Included	No
Battery Description	Lithium-Ion
Brand Name	GoolRC
Color	Black
Customer Package Type	FFP
Customer Reviews	4.3 out of 5 stars 250 Reviews
Included Components	'1/12 RC car, 2.4G transmitter, 7.4V 1500mAh lithium battery, Charger, Tool set, English manual'
Is Assembly Required	Yes
Item Weight	2.4 Kilograms
Manufacturer	GoolRC
Manufacturer Maximum Age (MONTHS)	840.00
Manufacturer Minimum Age (MONTHS)	168.00
Manufacturer Part Number	ECJ7070736449243TF
Material Type	PVC Rubber
Maximum Speed	31.07 Miles per Hour
Model Name	12428
Model Number	12428
Number of Items	1
Operation Mode	Remote Control
Power Source	Battery Powered
Scale	1:12 Scale
Set Name	1/12
Size	380mm(L) * 225mm(W) * 180mm(H)
Subject Character	Bear
Theme	Car, Off-Road
Toy Vehicle Form	Car

GoolRC WLtoys 12428 RC Car, 1/12 Scale 4WD 50km/h High Speed RC Rock Crawler, 2.4Ghz Remote Control Off Road Truck for Adults & Kids

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