What kind of batteries does the booster take?

If your handy with simple electronics you can get like a charger. I used the one for my old braun electric shaver. Just cut off the end that attaches to the shaver. Buy some alligator clamps like at lowes and attach the positive and negative cables to the clamps. Then just clamps negative to where the negative side of the battery would go.then same for positive. Or unscrews the botton and attach each lead to the motor. I did it and works fine. Kept using batteries for my nephew. Recently i took built in motor for an air mattress air pump. I had to modify everything but pretty fun. It kinda overpowered now launching car had to have a tunner on the exit because they catch air but the tunnel took care of that.

Is this powerful enough to launch it through the infinity loop?

No. It’s great to regain speed with a long stretch of track but it will not work with the infinity loop (we have one )

How do you select either of the two speeds mentioned in the description?

Hi Jon, Unfortunately, there is only on or off. The listing description is not entirely accurate. It is a different version of the booster that has two speeds. I have submitted for it to be changed but since many sellers contribute to the listing description it is not guaranteed to be corrected. It does offer a high-speed boost, I have seen some comments offering it is not a fast boost - I think in that scenario it is the width of the car that is not allowing it to be "boosted" enough. My grandson and I use these boosters quite a bit and find they give a car enough of a boost to make a full loop, some even two. I would also recommend using quality batteries. Thanks!

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🚀 Boost your race game with vibrant speed and portable power!

PLUG PLAY POWER - Battery-powered thrill with 2 D and 4 AA cells—ready when you are
COMPACT YET MIGHTY - Portable 1:64 scale design fits anywhere, fueling creativity anytime
TRUSTED MATTEL QUALITY - From the iconic Hot Wheels brand, engineered for durability and endless races
VIVID MULTICOLOR MAGIC - Striking colors that make your track the centerpiece of every playroom
NO ASSEMBLY ALL ACTION - Out-of-the-box excitement—no setup delays, just instant fun

The Hot Wheels GBN81 Track Builder Booster Pack is a compact, multicolor playset designed at a 1:64 scale. It requires 2 D and 4 AA batteries (not included) for powered action, weighs just under 500 grams, and comes ready to use with no assembly needed. Manufactured by Mattel, this portable booster pack enhances any Hot Wheels track with vibrant colors and instant power, perfect for millennial professionals seeking quick, engaging play moments or nostalgic desk decor.

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€ 334.11

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Slovakiastore

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Language:	Multilingual
Model Number	GBN81
Number of Puzzle Pieces	4
Assembly Required	No
Scale	1:64
Batteries Required	Yes
Batteries Included	No
tech_spec_battery_description_toys	requires 2 D cell batteries and 4 AA batteries
Remote Control Included?	No
Colour	Multicolor
Product Dimensions	8 x 15 x 13 cm; 493 g
Batteries	2 D batteries required.
Item model number	GBN81
Manufacturer	Mattel
Item Weight	493 g

Hot Wheels GBN81 Track Builder Booster Pack Playset, Multicolor

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