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  • CTEK US 800 12V Smart Battery Charger
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CTEK US 800 12V Smart Battery Charger

by CTEK

List Price: $49.99
Price: $46.49 & FREE Shipping. Details
You Save: $3.50 (7%)
Only 17 left in stock.
Sold by Hoerr Racing Products and Fulfilled by Amazon. Gift-wrap available.
  • Includes two interchangeable connection leads, one with clamps, and one with eyelet terminals; 5 year limited warranty
  • Four step, automatic switch charging, that allows for easy, convenient, no-watch battery charging
  • Charges 12-volt lead-acid batteries (Wet, MF, Gel and AGM) from 12Ah to 32Ah (charging), 12-100Ah (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, and the charger to be connected for months, makes this charger ideal for motorcycles, cars, lawn mowers, jet skis and any other vehicle with batteries up to 100Ah
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10 new from $40.31

Frequently Bought Together

CTEK US 800 12V Smart Battery Charger + CTEK 56-263 Comfort Connect Cig Plug + CTEK Multi US 3300 12-Volt Smart Battery Charger
Price for all three: $108.22

Buy the selected items together

Product Information

Technical Details
BrandCTEK
Item Weight1.6 ounces
Product Dimensions5.5 x 2 x 1.5 inches
Item model number56-213
Manufacturer Part Number56213
Voltage12
  
Additional Information
ASINB002QUT8IC
Best Sellers Rank #106,958 in Automotive (See top 100)
Shipping Weight2 pounds (View shipping rates and policies)
ShippingCurrently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
Date First AvailableNovember 22, 2008
  
Warranty & Support
Warranty, Parts: Parts
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Product Description

Amazon.com

CTEK Power's US 800 is a switch mode battery charger with pulse maintenance and is a part of a series of professional battery chargers from CTEK Sweden AB. These chargers represent the latest technology within battery charging. A recent addition to the CTEK family of "the smartest battery chargers in the world," the US 800 automatically and easily charges all smaller 12V lead-acid batteries, making it perfect for motorcycles, cars, lawn mowers, jet skis and any other vehicle with batteries up to 100Ah.

CTEK logo
Four-step Automatic Battery Charging Cycle
There is no need for any specific knowledge of batteries or their charging methods; the US 800 will take care of it. The US 800 utilizes a four-step fully automatic charging cycle. First, patented desulphation functionality allows for possible reconditioning of batteries that have lost power due to nonuse. This is followed by Bulk Charging, when 80% of charging takes place; then Absorption Charging which completes charging up to virtually 100%; and finally Pulse/Maintenance Charging, in which the battery receives a pulse of electricity when the voltage drops below 95%, keeping the battery in perfect condition indefinitely when it is not used. If the battery is loaded and the battery’s terminal voltage drops to 12.9V the charger automatically switches back to the beginning of the four-step cycle. Also, the US 800 can be connected for months and it is specifically developed for seasonal vehicles.

CTEK US 800 12V Battery Charger
Safe, automatic charging suitable for all-weather conditions.
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4-step battery charging explained.
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Charger includes alligator clips with cables for instant connections, and a set of battery cables with eyelet terminals for semi-permanent installation.
View larger.
Charging for All-weather Conditions
A very light and compact charger, but still extremely robust and water and dust resistant (IP65 classification), the US 800 is designed to charge and maintain batteries, no matter the weather, temperature or situation. The US 800 is certified for use between –4°F and +122°F. In order to make things easier and more convenient, its Comfort Connect (eyelet terminals) can be permanently connected to the vehicle’s battery.

Designed for Safety and Compatibility
All CTEK models are designed to consider the safety of the user. They are spark free, making the connection much easier and safer, considering the gases batteries normally produce. The US 800 is also protected from reverse-polarity connections and is short-circuit proof. A red light on the charger will simply indicate that the charging cannot begin until the user has connected the charger correctly. In addition, unlike less-sophisticated chargers, there is no need to disconnect the battery from the overall vehicle system since the US 800 is specially designed to not damage electronic systems.

Key Features:

  • Four step, automatic switch charging, with patented desulfation functionality to recondition batteries that have lost power due to nonuse.
  • Charges lead-acid batteries (Wet, MF, Gel and AGM) from 1.2Ah to 32Ah (charging), 1.2-100Ah (maintenance).
  • Maintenance pulse charging increases battery life and gives superb performance.
  • Pulse recovery of slightly sulphated batteries.
  • Low back current drain, low ripple and input voltage independent.
  • Includes two interchangeable connection leads, one with clamps, and one with eyelet terminals.
  • The charger can be connected for months, ideal for seasonal vehicles, and compact design with mounting holes allows for permanent assembly.
  • 5 year limited warranty.
The CTEK Battery Charger Line
 
US 800
Input voltage AC: 100–120VAC, 50–60Hz 100–120VAC, 50–60Hz 100–120VAC, 50–60Hz 100–120VAC, 50–60Hz
Output voltage: Nominal:12V Nominal: 6V Nominal:12V Nominal:12V
Efficiency: High 85% High 85% High 85% High 85%
Charging voltage: 14.4V 7.2V 14.4V/14.7V 14.4V/14.7V
Charging current: 0.8A max 0.8A max 0.8/3.3A max 7A max
Back current drain*: <1mAh <1mAh <1Ah per month <1Ah per month
Ripple**: ~2% ~2% ~2% ~4%
Ambient temperature: -4°F to +122°F -4°F to +122°F -4°F to +122°F -4°F to +122°F
Type of charger: 4 step, fully automatic switch mode with pulse maintenance 4 step, fully automatic switch mode with pulse maintenance 4 step, fully automatic switch mode with pulse maintenance 8–step, fully automatic switch mode with float pulse/maintenance
Type of batteries: 12V lead-acid batteries (Wet, MF, AGM and most GEL) 6V lead-acid batteries (Wet, MF, AGM and most GEL) 12V lead-acid batteries (Wet, MF, AGM, GEL and Ca) 12V lead-acid batteries (Wet, MF, AGM, GEL and Ca)
Battery capacity: 1.2–32Ah (charging) 1.2–100Ah (maintenance) 1.2–32Ah (charging) 1.2–100Ah (maintenance) 1.2–75Ah (charging) 1.2–120Ah (maintenance) 14-150Ah (charging)
14-225Ah (maintenance)
Dimensions (L x W x H): 5½ x 2 x 1½ inches 5½ x 2 x 1½ inches 6½ x 2⅜ x 1½ inches 8½ x 3½ x 1⅞ inches
Insulation class: IP65 (splash and dust proof) IP65 (splash and dust proof) IP65 (splash and dust proof) IP65 (splash and dust proof)
Weight: 0.7lbs 0.7lbs 1.1lbs 1.7lbs
* Back current drain is what drains the battery if the charger is connected without the power cord connected.
** Ripple describes the quality of the current and voltage. A high current ripple heats the battery and shortens its life. A linear charger has a current ripple of 70–400% which is much larger than the maximum 5% for a modern sealed battery. High voltage ripple could harm other equipment that is connected to the battery. US 800 delivers voltage and current with very low ripple. The battery has a long service life and there is no risk of damage to other electronic devices connected to the battery.

What's in the Box
1-CTEK US 800 12V battery charger, 1-set of battery cables with battery terminal clips, 1-set of battery cables with eyelet terminals, detailed instructions.

5-Year Limited Warranty
CTEK Sweden AB, provides a 5-year limited, nontransferable warranty issued from the date of purchase to the original purchaser of this product against defects in workmanship or materials.

About CTEK Power, Inc.
CTEK Power Inc. designs and develops a unique series of battery chargers and special solutions for all types of lead-acid batteries for both personal and professional use. Safety, simplicity and flexibility are key words and requirements that apply to all the products and solutions developed and sold by CTEK. CTEK has sold more than two million battery chargers worldwide, and has its own operations in the US and China, with main and development offices are located in Vikmanshyttan, Dalarna, Sweden.

Product Description

The CTEK US 800 is the perfect maintenance charger, it keeps your seasonal vehicles with batteries up to 100Ah in good shape. It easily charges smaller 12 Volt batteries common to motor bikes, lawnmowers and jet skis. The US 800 has a 5 year warranty, delivers 0.8-Ampere and is IP65 classified (Splash and dust proof). All CTEK battery chargers are electronic proof, non-sparking and reverse polarity and short circuit proof. IP 65. 110 Volt. Capacity 1.2-100 Ah. Charging current 0.8-Ampere. 5 5/8-inch x 2-inch x 1 3/8-inch. Weight 0.7 pounds.


Customer Questions & Answers

Customer Reviews

4.6 out of 5 stars
5 star
27
4 star
3
3 star
1
2 star
0
1 star
2
See all 33 customer reviews
It is compact and fits nicely in the supplied carrying pouch.
Kl Cape Cod
I have given both of these five stars, and I have no preference between the two.
John Kirsten
I expect to get longer life out of my batteries as others have been able to do.
G. David Jeffries

Most Helpful Customer Reviews

16 of 16 people found the following review helpful By John Kirsten on August 29, 2011
Verified Purchase
I have one of each of these battery maintainers. Both of these can be connected to a battery indefinitely without boiling it dry. Both come with a set of battery clips and a set of fuse-protected ring terminals for permanent installation. Both have reverse polarity protection(hook them up to the wrong terminals, and nothing happens). The Ctek has a power cord; the BatteryMINDer 12117 plugs directly into a socket. The BatteryMINDer has a button that allows you to select maintenance mode; the Ctek has no buttons.
Some reviewers say the Ctek gets very hot; it does. The BatteryMINDer gets equally hot, and is always hot when plugged in, whether it is in the charging phase or maintenance phase. When the Ctek is in maintenance phase, it is only warm.
The BatteryMINDer 12117 manual states that it desulphates in all modes. One reviewer stated the Ctek also continually desulphates, but the Ctek manual mentions desulphation only in the first stage of battery charging. It could be continuous, but an oscilloscope would be necessary to test that, and I do not have one.
The BatteryMINDer 12117 charges a battery to about 14.1 volts; the Ctek, 14.4. After the initial charge, both go into maintenance mode. The BatteryMINDer allows the battery to drop to 13.4 volts and then keeps it there exactly. The Ctek allows the voltage to drop to about 12.95 volts, gives it a pulse up to 13.05 volts, lets it drop to 12.95 volts, gives it a pulse up to 13.05 volts, etc. If the battery being charged by the BatteryMINDer does not get up to 14.1 volts, it will not switch into maintenance mode. If it does not switch within three days, the instructions state you should manually select that with the button.
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16 of 17 people found the following review helpful By A. Dent #1 HALL OF FAMETOP 50 REVIEWERVINE VOICE on May 20, 2010
Verified Purchase
In a few words, this is the one 12V battery charger even I can use - as in me being more computer technical than automotive technical person :).

So, before I say anything else, here are the specs so you do need to read further if this is not what you are looking for:

- 100-115VAC, 50-60Hz voltage AC
- 130mA rms at full charging current
- 2-32Ah battery size
- 0.8 A charging current
- 14.4 V charging voltage
- 5.5" x 2" x 1.5" size
- Developed in Sweden
- Made in China

The charger should work with nearly all 12V lead-acid batteries: MF, Wet, AGM, open and most GEL-batteries.

What you get for your money is:

- the charger body (see dimensions above) with the AC cord permanently attached to it
- set of battery cables with battery terminal clips
- set of battery cables with eyelet terminals
- a nice, velcro-sealed nylon black pouch with a transparent pocket for the manual
- a very well written manual

According to the manual, the charger should be maintenance free and it's covered by a 5-year limited warranty (void if you abuse it or try to fix it yourself after it breaks) and you get CTEK's exact address, Web site and FAX number but no 'voice' number.

I am very happy with this device because it charged our little tractor's battery in no time - overnight, actually - following a very long winter that had the battery totally drained.
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7 of 7 people found the following review helpful By Kl Cape Cod on April 28, 2011
Verified Purchase
I bought this after reading about it on the Ferrari forums. This is the same maintainer Ferrari provides with a new car, only without the Ferrari logo. It is compact and fits nicely in the supplied carrying pouch. I use it on my Alfa Romeo which is not driven very often. I was tired of a dead battery from the car sitting for a few months at at time. I keep the car plugged in all the time when I am not driving it. It s easy to unplug right before I drive the car and I just plug it in after I am done driving. No more dead battery. It is really nice, because when I use my car the battery is at full power and I don't worry if I go somewhere if my car will start because the battery is never low anymore. I would highly reccomend the charger for your battery charging (slow charging) and maintaining needs.
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4 of 4 people found the following review helpful By John A. Deluca Sr. on February 9, 2011
Have an 08 Corvette Z06 whose battery has gone dead in as little as 10 days of sitting. Using this battery minder is easy and reliable. I have had the car parked in the garage for 6 weeks at a stretch this winter and have had absolutely no battery issues! Very pleased.
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4 of 4 people found the following review helpful By S. Lyde on May 19, 2010
Verified Purchase
This charger came recommended by a friend, I was very surprised at the quality of this unit, the cables are very high quality and it does it's job without hum or buzz.
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4 of 4 people found the following review helpful By Terry B. Long on February 2, 2010
Verified Purchase
I plugged the Ctek charger into a stored car and it brought the battery up to charge as per instructions. It now maintains the car as advertised on a maintenance charge. The CTEK works exactly as it is supposed to. The cigarette lighter adapter was a welcome addition.
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3 of 3 people found the following review helpful By JP on November 5, 2011
Verified Purchase
I should have read the specs more closely, I purchased this to charge my mower and/or cars batteries. It's only rated up to 32aH for charging and 100aH for maintenance. So really is for smaller 12v batteries. My bad. However my wife's Altima wouldn't even turn over one day, it just 'clicked'. After 3 hours of charging the battery the battery had 13.5 volts (up from 12.4 volts) and started first time. The Altima battery is rated at 220aH, so this tiny little charger performed well beyond it's specification and intended use case. I'm impressed.

I've put the larger 7002 model in my wish list. I hope to get the correct charger for the applications I intend later. I won't buy any other brand charger after experiencing how their stuff works so well.
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