can I use a 2000 mah nimh battery?

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Dear customer.

Good late evening from Japan. This is Atsukiya and thank you for sending us your question 
about "Tamiya Fullcowl Mini 4WD Series No. 44 Beat Magnum Premium AR Chassis 19444…".
I checked web site of Tamiya for the nimh battery. The mAh of NiMH battery recommended 
to use for their cars says Min. 950 mAh only. 
  Then I also found following comment on web site which answering for someone who questioning 
why the Tamiya Neo Champ is NiMH battery even though they prohibited to use it for their car.
This person also mentioned his motor got burned after few runs. 
"The reason why the use of nickel-metal hydride batteries was prohibited was that the capacity of 
the initial nickel-metal hydride batteries was large, and when the tires were locked, there was a risk 
of heat generation up to high frequencies. Tamiya's Neo Champ has a small capacity, so you can use it."

From what I checked, the 2000mAh battery is too large for Tamiya cars and not recommended.

Hope this answers to your question.  Have a nice day.

Atsukiya

ASIN	B07Y38JN4H
Additional Features	Portable
Age Range Description	Kid
Battery Description	Alkaline
Best Sellers Rank	#189,437 in Toys & Games ( See Top 100 in Toys & Games ) #660 in Hobby RC Cars
Brand Name	TAMIYA
Color	Multicolour
Customer Reviews	4.6 out of 5 stars 272 Reviews
Educational Objective	Develop fine motor skills, problem-solving, and mechanical understanding through assembly and customization; foster sportsmanship and strategic thinking through competition.
Global Trade Identification Number	04950344194445
Included Components	Battery, Remote
Indoor Outdoor Usage	Indoor
Item Dimensions	6.1 x 3.82 x 1.85 inches
Item Weight	13.61 g
Manufacturer	TAMIYA
Manufacturer Part Number	19444-000
Manufacturer recommended age	14 years and up
Material Type	Acrylonitrile Butadiene Styrene,Resin
Model Name	Beat-Magnum
Model Number	19444-000
Model Year	2015
Number of Items	1
Number of Packs	1
Number of Players	1
Operation Mode	Remote Control
Power Source	Battery Powered
Set Name	Fully Cowled Mini 4WD Series No. 44
Size	Small
Subject Character	Go Seiba
Theme	Vehicles
Toy Vehicle Form	Car
Unit Count	1 Count

Tamiya Fullcowl Mini 4WD Series No. 44 Beat Magnum Premium AR Chassis 19444

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