Train Control Systems KA4 Keep Alive 1668

Train Control Systems KA4 Keep Alive 1668

Marsoni

M251S

$22.95

Get it in 3 business days with 1 day shipping. Friday, May 29

Train Control Systems KA4 Keep Alive 1668TCS Keep Alive (KA) devices are used to supply power to decoders during times of power interruption due to dirty track or problematic track work. The KA4 will power an HO Scale locomotive with headlights on for approximately 6 to 20 seconds (depending on the locomotive and the efficiency of the motor). This Keep Alive includes a Blue and a Black w White Stripe wire to attach it to a decoder. Dimensions: . 52 x . 52 x . 45 or 13. 22mm x 13. 22mm x 11.

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This is a nice unit. I got it as I have started traveling a bit. It is a headache to try to figure out where to plug everything in to get charges. Especially when you are staying at people's houses, I don't like bothering them. I can put this in my laptop bag and bring it along with all the cords that are still plugged in. I really like that it is two-prong plug and the cord swivels. It will work in any plug-in and location. It costs a bit more than some of the others, but I think it is worth the extra few dollars.

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Reviewed in the United States on November 13, 2025

Verified Purchase

Megan

Lowell, US

★★★★★ 4

Great

Color: White

Great product. Fits perfectly in my house. Only reason I gave 4⭐️ is because the plug has been loosening out of the outlet and making my tv turn off. The only reason I believe it’s doing that is because of the plug and how it can turn flat. Never had the problem with my tv before using this.

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Reviewed in the United States on July 30, 2023