how many amps is this rated for and how long is it rated for

It is rated at 5 amps continuous. It is designed to be used with a trickle charger which charges at no more than 3 amps - 12 volts. I am sure that it could handle more up to the capacity of the connector and or wires however I do not know what that would be. It is a very well made device. From your question it sounds like you plan another use for it so common sense comes into play. Good luck on your project. Harold

does this connector have a typical cap or cover over thr ends to protect from dirt/water etc?

Yes, it has a plastic cap/cover to protect the connectors... at least mine does.

Red goes to positive and does the black go to negative or it should be grounded?

Red to positive and black to negative simply because the cable fitting has a convenient bolt to securely attach it to . (Battery is grounded anyway)

will the eyelets fit the larger screws on rv gel batteries

The eyelets will not fit the terminal screw post on a regular size battery. However, they are easily changed and the effort is well worth it. I have three Interstate deep cycle batteries on my fishing pontoon and one of these units on each battery. Each battery has its own battery box. When it is charging time, just plug the charger into this pig tail and charge. No removing the batter box lid to get to the battery terminals. Great little piece of equipment. Highly recommend Big Spoodie

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Schumacher Electric 18-Inch Ring Connection Cable, for Car Battery Chargers and Maintainers, Quick Connect, for Motorcycle, Power Sport, and Lawn Tractor Batteries, WM-12, 1 Count (Pack of 6)

Product ID: 4134003

Details

Amperage
5 A
Brand
Schumacher
Color
Black
Current Rating
5 A
Item Weight
22.68 g

⚡5 Amp max current

🎨Color-coded cables

🔗Quick-connect harness

Description

🔋 Charge smarter, not harder — stay powered and ready!

COMPACT 18 INCH REACH - Perfect length for tight spots on motorcycles and lawn tractors.
PLUG PLAY SIMPLICITY - Install in moments and keep your battery ready for every ride.
PRECISION COLOR CODING - Error-proof installation with intuitive cable colors.
EFFORTLESS QUICK CONNECT - Hook up your charger in seconds—no clamps, no hassle.
TRUSTED SCHUMACHER DURABILITY - Legacy of quality since 1947 powering your battery needs.

The Schumacher WM-12 is an 18-inch ring connection cable designed for seamless, quick-connect compatibility with Schumacher battery chargers and maintainers up to 5 Amps. Featuring color-coded cables for easy, error-free installation, it’s ideal for hard-to-reach batteries on motorcycles, power sports vehicles, and lawn tractors. Built with trusted Schumacher quality, this cable ensures reliable, hassle-free battery maintenance and charging.

Specifications

ASIN	B0F671PQTP
Best Sellers Rank	#131,829 in Automotive ( See Top 100 in Automotive ) #587 in Automotive Replacement Negative Battery Cables
Brand	Schumacher Electric
Built-In Media	Cable Connector
Color	Black
Compatible Devices	Schumacher chargers and maintainers 5 Amps and under
Connector Type	Ring Connector
Connector Type Used on Cable	Ring Connector
Customer Reviews	4.7 out of 5 stars 4,330 Reviews
Item Type Name	Ring Connection Cable for Battery Chargers and Maintainers
Manufacturer	Schumacher Electric
Mfr Part Number	WM-12
Model Number	WM-12
Number of Items	6
Unit Count	6 Count
Warranty Description	1 Year Warranty

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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Received my product in pristine condition. Great service overall.

1 month ago

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