CTEK Battery Charger – 12V Series

CTEK Battery Charger Multi US 7002 & MUS 4.3 Polar 12V

Part #: 56-353 (Multi US 7002) | 56-958 (MUS 4.3 Polar)

The CTEK Battery Charger is built to charge, maintain and bring back tired 12-volt batteries. It works on cars, motorcycles, trucks, boats and powersport machines. You clip it on, and the charger figures out the right program by itself. It also watches the battery the whole time so it doesn’t get overcharged or damaged.

There are two models here. The Multi US 7002 is the all-rounder for bigger batteries. The MUS 4.3 Polar is the one to pick if you live somewhere that freezes.

Multi US 7002 (Part 56-353)

• Output: up to 7A
• Battery range: 14Ah to 150Ah, with maintenance up to 225Ah
• Charging: 8-step, fully automatic
• Battery types: lead-acid, AGM, maintenance-free
• Modes: Normal, Cold-Weather, Supply
• Voltage: 12V
• Safety: spark-free, reverse-polarity protection
• Weather: dust and splash resistant

MUS 4.3 Polar (Part 56-958)

• Output: up to 4.3A
• Made for extreme cold
• Temperature-adapted charging program
• Works with AGM and standard 12V batteries
• Long-term maintenance mode
• Smart desulfation function
• Safe for small motorcycle batteries

Why riders and owners like this CTEK Battery Charger

It charges on its own. The charger reads the battery’s condition and adjusts current and voltage through an 8-step cycle, so you don’t have to guess what the battery needs.

The Polar handles winter. It runs a special program for freezing temperatures and keeps working when a normal charger gives up. Your vehicle still starts after a long cold night.

You can leave it connected. Maintenance mode is made for storage, there’s no overcharge risk, and it can stay on for months. That suits a motorcycle that sits all winter or a weekend car that barely moves.

It protects you too. The clamps are spark-free, and you get reverse-polarity and short-circuit protection. A first-timer can use it just as safely as a mechanic.

It can revive weak batteries. The desulfation program wakes up a battery that’s gone flat and can help it last longer, which may save you from buying a new one early.

It fits most of what you own: cars, motorcycles, ATVs, boats, trucks and lawn equipment.

How it plays out in real life

Say you park a Softail in the garage from November to March. Spring comes and the battery is weak. You hook up the CTEK Battery Charger before bed. By morning the bike starts without a push and without a new battery.

Or take a truck owner in Minnesota who dreads cold starts every year. With the Polar left on during a deep freeze, the truck fires on the first turn of the key.

Good fits for this charger

• Motorcycles stored for winter
• Cars used for short daily trips
• Classic vehicles
• Marine and RV batteries
• Powersport machines

FAQ

Can I leave the CTEK Battery Charger connected all winter? Yes. Maintenance mode is made for long storage and won’t overcharge the battery.

Which model works best in cold weather? The MUS 4.3 Polar (56-958). It’s built for freezing temperatures.

Does it work with AGM batteries? Yes, both models handle AGM and lead-acid batteries.

Can it bring back a weak battery? Often, yes. The desulfation step can restore many discharged batteries.

Is it safe for a motorcycle battery? Yes. The smart control looks after small 12V batteries, and the Polar is made with them in mind.

Do I have to take the battery out first? No. You can charge it while it’s still installed.

The CTEK Battery Charger Multi US 7002 and MUS 4.3 Polar come down to smart charging, solid safety and longer battery life. They’re easy to use every day and easy to trust for long-term storage.