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Bosch C3 Fully Automatic 4-Mode 6/12V Smart Battery Charger and Maintainer (3.8 Amps)

4.1 out of 5 stars 1,098 ratings

Temporarily out of stock.

We are working hard to be back in stock as soon as possible.
Brand Bosch Automotive
Color Grey
Item Weight 1030 Grams

About this item

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  • SmartAMPs Technology utilizes optimum charge current (from .8 to 3.8 amps) depending on battery’s condition and charging stage, providing fast, high quality charges that ensure maximum battery life
  • Micro Computer Unit provides state-of-the-art charging to restore sulfated, discharged, and acid stratified batteries to their original capacity without under or overcharging
  • One touch smart charging with automatic voltage detection for easy operation
  • Maintenance charging mode automatically switches on when battery drops below 12.8V
  • Suitable for all types of lead-acid batteries - AGM, WET, GEL, open, VRLA and cold - in trucks, cars, motorcycles, lawn tractors, recreational vehicles batteries
  • Spark, short circuit and reverse polarity protection ensure the safety of the operator and health of the battery
  • Dust and water splash resistant
  • Included accessories like hook, charger cable with built in fuse, and two fully insulated charger clamps
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Customer Rating 4.1 out of 5 stars (1098) 4.7 out of 5 stars (7877) 4.8 out of 5 stars (2285) 4.7 out of 5 stars (7972) 4.7 out of 5 stars (1547) 4.6 out of 5 stars (6279)
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Product description

Product Description

The Bosch battery charger for 6 volt and 12 volt lead acid batteries (AGM, WET, GEL, open, VRLA) uses state-of-the-art charging technology and self-monitoring functions to ensure high quality charging for long battery life. One button operation, built-in pulse and trickle charge function, and a comprehensive safety concept make these chargers very easy and safe to use. Built in safety features like spark, short circuit and reverse polarity protection ensure the safety of the operator and the health of the battery.

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The Bosch C3 6V/12V Smart Battery Charger and Maintainer is an ultra portable, automotive battery charging and maintaining device. It can be used with a variety of lead-acid batteries (AGM, WET, GEL, open, and VRLA) in vehicles such as cars, light-duty trucks, motorcycles, antique cars, boats, jet skis, ATVs, snow mobiles, lawnmowers and RVs. The intelligent C3 Battery Charger and Maintainer from Bosch provides battery charging that is easy and safe and will restore sulfated, acid stratified, and discharged batteries to their original capacity without under- or overcharging. By using a Bosch Battery Charger and Maintainer you will ensure the longest life of your battery. Additional features include an integrated AC power cord and battery clamps, dust and splash proof construction and a mounting hook for truly portable use.

The main body of the Bosch C3 6V and 12V Fully Automatic 4-Mode Battery Charger and Maintainer
Smart charging and maintaining of 6V and 12V batteries that goes wherever you do.
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Reliable 6V/12V Charging With Maximum Safety

Vehicles today are often equipped with a wide array of power-robbing accessories such as GPS navigation units, stereo sound systems, video players, daytime running lights, and many other electrical convenience functions. All these items place a high demand on a vehicle's battery which can lead to discharge, sulfation, or acid stratification. The best way to ensure reliable starting of your vehicle is to keep a regular check on the battery charge--especially in vehicles not used year-round, such as motorcycles, convertibles and classic cars. Battery chargers from Bosch are first aid for exhausted batteries and return them to top condition.

The box contents of the Bosch C3 6V and 12V Fully Automatic 4-Mode Battery Charger and Maintainer
Everything you need is integrated and/or included in the box.
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The Bosch C3 and C7 Battery Chargers and Maintainers, each using a mounting hook for use on-vehicle
The included charger mounting hook allows for easy charger placement between your AC power source and your battery.
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Intelligent charging helps maintain and restore batteries
Intelligent charging helps maintain and restore batteries.
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The Bosch Battery Charger and Maintainer is a smart charger operated by a MCU processor that provides state-of-the-art charging technology that allows the charger to interact with and respond to the condition of the battery. It modifies its charge action based on the feedback from the battery in order to provide a high quality charge that restores sulfated and discharged batteries to their original capacity without under- or overcharging.

The Most Intelligent Battery Chargers

Since it is a smart charger, it will automatically detect the voltage of the battery and select the proper series of charging stages based on the needs of the battery. It can be left connected to the battery and will switch to the maintenance charging mode when the battery voltage falls below 12.8V. The float and maintenance cycles are repeated indefinitely to keep the battery at full charge without overcharging.

Unlike manual and automatic battery chargers that treat all batteries the same no matter what condition they are in and charge with a steady, unregulated current, the Bosch Battery Charger and Maintainer uses SmartAMPS Technology, the optimum charge current depending on the battery’s condition and the current charging stage, to provide a fast, high quality charge that ensures the longest life of your battery.

One-Button Smart Charging

You do not need to be a specialist to use the Bosch Battery Charger and Maintainer. Simply attach the two insulated charger clamps integrated into the opposite end to the appropriate battery posts of the lead-acid battery being charged or maintained. Then plug in the AC power cord, integrated at one end of the charger, to a standard 110-volt household outlet. Finally use the mode button to select from 4 charging modes to instantly begin charging. Its is as easy as connect, plug in, and turn on. For extra convenience the included charger mounting hook allows you to hang the charger upright in the best spot possible between the battery and the AC power source.

The Safest Charger to Use

Safety is an important concern around any power source. One-button operation, built-in pulse and maintenance charge function, and a comprehensive safety concept make the Bosch C3 Battery Charger and Maintainer very safe to use. If an abnormal situation occurs, such as when the charger is incorrectly connected or there is an abnormal charging time, the charger switches automatically to standby mode to protect the battery from damage. Additionally the charger is designed to protect against spark, short-circuit, reverse polarity, and overheating, making this the safest charger you can use.

What's in the Box?

Bosch C3 6V and 12V 4-Mode Smart Battery Charger and Maintainer, charger mounting hook, charger cable with built in fuse, 2 fully insulated charger clamps, harness with mounting rings and instruction manual.

About The Bosch Group

The Bosch Group is a leading global supplier of technology and services in the areas of automotive and industrial technology, consumer goods, and building technology. The Bosch Group comprises Robert Bosch GmbH and its more than 300 subsidiaries and regional companies in over 60 countries. If its sales and service partners are included, then Bosch is represented in roughly 150 countries. This worldwide development, manufacturing, and sales network is the foundation for growth. Each year, Bosch spends more than 3.5 billion euros for research and development, and applies for some 3,800 patents worldwide. With all its products and services, Bosch enhances the quality of life by providing solutions which are both innovative and beneficia


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Customer reviews

4.1 out of 5 stars
4.1 out of 5
1,098 global ratings
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Top reviews from the United States

Reviewed in the United States on August 10, 2016
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3 people found this helpful
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Reviewed in the United States on December 10, 2014
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9 people found this helpful
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Reviewed in the United States on March 18, 2015
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One person found this helpful
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Reviewed in the United States on December 10, 2015
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One person found this helpful
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Reviewed in the United States on March 18, 2015
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2 people found this helpful
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Top reviews from other countries

Karan
2.0 out of 5 stars Threshold charge requirement is a disappointment.
Reviewed in India on November 23, 2018
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215 people found this helpful
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T. Pereira
5.0 out of 5 stars Wonderful charger for bike and cars
Reviewed in India on June 18, 2018
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71 people found this helpful
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K. G.
5.0 out of 5 stars Excellent charger for HD Sportster Bike.
Reviewed in India on November 2, 2017
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82 people found this helpful
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Sid Verma
5.0 out of 5 stars Exceptional charger, thoroughly impressed. Go for it!.
Reviewed in India on July 9, 2020
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5.0 out of 5 stars Exceptional charger, thoroughly impressed. Go for it!.
Reviewed in India on July 9, 2020
I was hesitant to buy this charger because of some negative feedbacks but went ahead to buy because of Bosch brand. I am glad I did. No regrets!

It appears the people who gave negative feedback don't know how to use it. I hope my feedback helps you in making the right decision. I have also attached snapshots from the manual to help you make an informed decision. Overall this is a brilliant charger and I am amazed at this intelligent piece of technology.

Both my car batteries couldn't survive the lockdown. One of the batteries was completely dead for months and the other for my XUV refused to start the car and had a very low charge, cabin lights wouldn't switch on either. So you can imagine the state of both batteries.

I connected my XUV battery to the charger first. It automatically detected it as a 12v car battery after a few seconds. I left it over night for about 14-15 hours and the battery was completely charged. Upon completing the charge the 'OK' LED on the charger lit up.

Now my second battery was of Tata Nano - a smaller 12V battery completely dead for months. On connecting, the charger refused to detect it and went on standby mode. I still left it connected for some time but it didn't detect or charge it. Now I don't know the technical/scientific reason behind why Bosch would make a charger that won't charge a completely dead battery, but fact is it doesn't. This is also mentioned in their Manual (see the manual snapshot).

So as a work around, using jumper cables, I gave the nano battery an initial charge with the XUV battery (15 minutes did it). Then the charger detected the battery and because it was a smaller battery it detected it as a two wheeler battery on 6V. However, I pressed the mode button on the charger twice and it quickly changed the mode to 12V car battery. Easy!

Now here's the technological genius in this charger - because this battery was completely drained, it charged this battery in a different way than XUV battery. For the first 5-7 hours it used pulse charging so as to not stress a dead battery with sudden charge. The lights on the charger would blink/flicker in a way indicating a pulse. After that the battery started charging in a normal way. This dead battery took longer time to charge, about 24 hours or so.

Note -
1) Add distilled water to the batteries before charging, in case there is less water in them.
2) Clean the battery terminals.
3) Do not charge dry batteries. This charger is not meant for it.

Pro's:
1) Marvel of a charger that detects the battery, understands its state, size and volt and charges it gently to ensure longer battery life.
2) Displays when the charge is complete and auto cuts-off to prevent over charging.
3) Trickle charges your battery towards the end to prevent any stress or over charging.
4) Has memory function, so if you lose power, the charger retain the last charge state and starts from there.
5) Has inbuilt 16A fuse to prevent an electric surge passing to your battery.
6) Has reverse polarity protection. Detects if you have wrongly connected the terminals. Charging won't start until terminals are connected correctly.
7) Can charge Gel (AGM) batteries also.
8) Charger does not heat at all and neither do the batteries.
9) No maintenance required for the charger.
10) Charger wire is about 1.5 meters length and the Terminal wires are also about 1.5 in length. So the cables give a good 3 meter or so length.
11) Compact and very light charger that you can hang on the wall.
12) Terminal quality and wire quality is very good.
13) LED display is well designed and manual explains everything.
14) Has a two pin wall plug. Works on 230V. No adapter required.

Cons:
1) You will need at least some charge left in your battery. It will not charge a completely dead battery.

Conclusion:
Buy it, it's a great compact charger for safe and effortless charging.

Although long, i hope my review helped you make up your mind.

Cheers!
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24 people found this helpful
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vinay yadav
1.0 out of 5 stars Read review carefully before buying
Reviewed in India on January 18, 2019
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34 people found this helpful
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