Voltage Sensitive Relay (VSR)

Marsoni

M251S

$36.95

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

Voltage Sensitive Relay (VSR)VSR (Voltage Sensitive Relay) or ACR (Automatic Charging Relay) are automatically controlled switches that allow two batteries to be combined when charging, and to be isolated when not charging and current is draining from one of the batteries. When used with battery switches, a VSR helps to reserve a fully charged battery at all time, avoiding a dead battery at sea. Features Automatically combines two batteries when charging and isolates the two

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We offer a 30-day return/exchange service after receiving.
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Yoooooo great product but what is with the comically tiny screws? Actually installing this on the underside of a wooden desk is near impossible unless, of course, you are in fact a Disney princess and in charge of a team of handy-dandy mice all with #0 Phillips head screwdrivers and 5/32" drill bits. They drill, you hold, kind of thing.

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Reviewed in the United States on May 11, 2026

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Totentanz1980

Omaha, US

★★★★★ 5

Great for cable management

Size: 6ft Cord, Color: 20W_Black

If you are obsessed with keeping cables neatly organized for your desk, this is the perfect power strip to get. It comes with decent enough screws for mounting that will hold the weight of all the cords you plug in. The outlets on all three sides is very convenient and makes it a snap to fit all your devices in even with some having very large adapters on the plugs, which often take up a majority of the power strip. I have already purchased a couple more so I can organize my wife's desk and one of my kid's desks.

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Reviewed in the United States on December 1, 2025

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Lilnono

Los Angeles, US

★★★★★ 5

Affordable yet quality

Size: 10ft Cord, Color: 20W_Black

I bought 2 of these to screw in place under my desk. Good quality and works good.

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Reviewed in the United States on January 2, 2026

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Evelyn Barlow

Phoenix, US

★★★★★ 5

Very nice

Size: 6ft Cord, Color: 20W_Black

Perfect for what I needed. Plenty of plugin space.

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Reviewed in the United States on October 31, 2025

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doglogic

Carnegie, US

★★★★★ 5

Fine, Be Careful How You Mount It

Size: 6ft Cord, Color: 20W_Black

Good power strip with the functionality that I needed. 12 plugs and usb. Be careful how you mount it because the plugs on one side are upside down. You may have to buy thin pigtails which I did.

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Reviewed in the United States on March 21, 2025