CTEK Multi US 3300 12-Volt Smart Battery Charger

• Includes two interchangeable connection leads, one with clamps, and one with eyelet terminals
• Four step, automatic switch charging and three separate charge modes that together allow for easy, convenient, no-watch battery charging
• Charges 12-volt lead-acid batteries (Wet, MF, Gel, AGM and Ca) from 12Ah to 75Ah (charging) or 12-120Ah (maintenance)
• Maintenance pulse charging increases battery life and gives superb performance, and patented desulphation functionality allows for the recovery of slightly sulphated batteries
• Compact design with mounting holes allows for permanent assembly, making this charger ideal for motorcycles, cars, lawn mowers, jet skis and other vehicle with batteries up to 120Ah
• A Great All-Around Charger
• Fully automatic - for charging and maintenance
• Flexible for different battery needs
• Patented desulphation function
• Made for all weather conditions and situations

I own two of these excellent chargers they are very simple to operate and very durable.

The chargers are weatherproof, and you can permanently mount them in the engine compartment with the provided ring terminals, or just use the alligator clips.

The charger has a battery status indicator (low / full), and settings for Motorcycle, Car, or Gel battery. The charger cycles from trickle current, to pulses, and shuts off when the battery is full. There is no better charger for winter storage battery tending, bringing nearly dead batteries back to life, or just recharging boat batteries slowly overnight.

Finally, I should mention that the current version of the 3300 has some improvements over the already excellent older version (I now have one of each). The latest version includes:

Heavier gauge wiring

Much heavier and more durable alligator clips

A nice zip-up storage case

Buy CTEK Multi US 3300 12-Volt Smart Battery Charger Now

This charger, as well as the current (more popular) Battery Tender chargers are both made in China. This charger seems to be superior to my Battery Tender chargers in that it appears to be well sealed, of a more modern design, spark proof. Enclosed in a two piece cast housing, not an aluminum box. The charging algorithms will bring back a sulphated battery in some cases. It has three different charging settings, and brought my sulphated APC UPS battery back to limited life. It is particularly well suited for small motorcycle size batteries as well as larger batteries. It may be left connected indefinitely.

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My only complaint is the cheap power cord that gets as stiff as a broomstick in extreme cold. . . . . $%##@!! cheap plastic covered power cords, anyway!

Read Best Reviews of CTEK Multi US 3300 12-Volt Smart Battery Charger Here

I ordered 2 different chargers to maintain my gate opener's deep cycle battery (a simple 4 output charger with extension cords for charging other deep cycle batteries from amazon Battery Tender 022-0148-DL-WH 12V 4-Bank Battery Management System) and this unit has a far superior charging design.

The 4 bank battery tender does a simple fast rate charge then switches to a trickle charge at a constant voltage with 4 outputs.

This unit pulses the battery under charge and features 3 operating modes with different current outputs for different sized batteries. The selections are motorcycle which also works well for SLA gel cells or AGM batteries, standard automotive starting battery, deep cycle batttery, and off.

What makes the CTEK unit special is that it uses a pulse charge in all modes to attempt to desulphate batteries, while the battery tender does not. This method of charging has proven successful in restoring lead acid batteries that won't take a charge any more.

It comes with a waterproof 12V output cable and a set of clips or rings for permanent installation under the hood of your car. In addition to the LEDs for indicating the type of battery being charged, a second set is provided for empty, 1/2 full, and maintenance pulse charge mode.

There is also a noticable increase in quality between the battery tender and this unit small details like a water sealed housing and gaskets on the connectors indicate quality in manufacture.

For a single 12V lead chemistry battery this is a useful, well made tool.

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This is the best charger ever. I have a lead plugged into my motorcycle, and 2 cars and I rotate it between the 3 of them and they start up like th battery is brand new. This will pay for itself just in not having to buy a new battery. Don't think you'll find something similar at wal mart for half the price. Don't go cheap as this is the best and well worth it.

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This is a great charger. Our family van doesn't get driven much during certain times of the year so it sits in the garage. It's on its second battery and I am determined to keep this one fresh and topped off. The included dongle for for permanent installation makes this a snap, all I have to do is pop the hood and connect it up to the connector and I'm done. The charger automatically goes into maintenance mode where it keeps the battery nice and happy. I've also used this charger to revive an otherwise completely drained battery for a neighbor's car. He left an interior light on and discovered that the battery was completely flat two weeks later. I let him borrow this charger and it fully charged the battery over a weekend and the battery has not given my neighbor any more issues.

It costs more than some of the dumb battery chargers, but this one takes up less space, comes with valuable accessories, and provides enough current to properly charge larger capacity batteries. Two thumbs up!