Bosch Battery Chargers/Maintainers use SmartAMPS Technology which is a feature that continuously monitors the condition of your battery at every phase. This ensures that your battery is continuously charged at the optimal level in order to avoid under-or overcharging. The SmartAMPs technology also provides a fast, high quality charge that ensures the longest life of your battery.

Robert Bosch (commonly known as Bosch) is a leading German global supplier of technology and services in the areas of automotive and industrial technology, consumer goods, and building. It is the world largest supplier of automotive components and stands for precision, quality, and longevity. The Bosch motto, “Invented for Life,” reflects its goal to develop innovative, high quality technologies that make life more efficient, safer and more comfortable.

With Bosch battery charger/maintainers you can charge domestic as well as foreign made car batteries. Bosch has been supplying automotive parts for domestic applications that meet or exceed OE specifications for many decades.

Yes, Bosch also carries batteries. They are the premium battery brand in over 104 countries in the world and satisfy the highest starting and power supply standards especially for new vehicles with many electrical consumers.

You can download a copy of the user manual from our website under the document section of the Bosch Battery Charger Page.

Robert Bosch LLC (seller) warrants to the first using purchaser only that the battery charger/maintainer sold to the first using purchaser by seller or its authorized dealer, retailers or service centers in the United State, Canada and Mexico will be free from defects in material or workmanship for a period of two (2) years from date of purchase. SELLER’s sole obligation and your exclusive remedy under this Limited Warranty and, to the extend permitted by law, any warranty or condition implied by law, shall be the repair or replacement of parts, without charge, which are defective in material or workmanship. The Limited Warranty provided in this Statement excludes any defects or damage arising from accident, alteration, misuse, abuse, improper installation, unauthorized service work, external forces beyond seller’s control, such as fire, flood, and other acts of God. The limited warranty further excludes normal wear and tear on parts and damage to fragile components (e.g. switches).

In general you can always charge a battery as long as it is not completely drained, frozen, or at the end of its life-cycle.

For a negative-grounded vehicle, connect the cables by first connecting the positive (red) charger clamp to the positive post of the battery. Then you connect the negative charger clamp to the car frame or engine block away from the battery.

For a positive-grounded vehicle, connect the negative (black) charger clamp to the negative post of the battery. Then you connect the positive (red) clamp to the car frame or engine block away from the battery.

Its is as easy as Connect – Plug In – Turn On. You do not need to be a specialist to use the Bosch Battery charger/maintainer. Simply attach the two insulated charger clamps integrated into the opposite end to the appropriate battery posts of the battery being charged or maintained. Then plug in the AC power cord, integrated at one end of the charger/maintainer, to a standard 110-volt household outlet. Finally, use the mode button to select from different charging modes to instantly begin charging.

If you have specific questions about Bosch chargers/maintainers, you can click on the contact link at the top of the page.

You can do the following things to extend the life of your battery:

• Use warm water and a mild detergent to remove grease and dirt from the plastic surface of the battery. Dirt can actually act as a conductive agent, causing the battery to constantly discharge slightly.
• In removing or cleaning the battery, remove first (-) ground cable followed by the (+) cable. If you are going to reinstall the battery, the (+) cable must be put first before the (-) ground cable. In this way, you can avoid a short circuit if the wrench accidentally touches the grounded part of the vehicle.
• Make sure the battery is firmly secured to its mounting bracket. An unsecured battery that shifts around can become damaged, and possibly cause short circuits. All exposed metal parts of the terminals and cables should be greased to prevent future corrosion.
• Change the battery if you happen to see any cracks, vents or swelled battery casing. Most likely your battery is gradually failing and replacement is inevitable.
• Check the terminals where the battery cables connect to be sure they are tight and free of corrosion. If corrosion is present get a qualified technician to clean the terminals.

Amp stands for Ampere and is the measure of the electric charge passing a point in an electric circuit. It is the strength of an electric current. Too high of an amperage, such as in rapid chargers, can overcharge and cause damage to your battery. Bosch Battery Chargers and Maintainers uses SmartAmps technology continuously monitors the condition of your battery at every phase. This ensures that your battery is continuously charged at the optimal level in order to avoid under-or overcharging. The SmartAMPs technology also provides a fast, high quality charge that ensures the longest life of your battery.

No, with the Bosch battery charger/maintainers you can only charge lead-acid batteries which you can find in the automotive industry. These are batteries that you can find in most cars, trucks, boats, etc. Other batteries like dry-cell batteries or regular household batteries cannot be charged using the Bosch battery charger/maintainer.

Never charge a frozen battery. Charging a frozen battery may cause battery explosion. Remove the battery from the vehicle, bring it into a warm room and let it thaw before charging.

Generally, all types of batteries (AGM, WET (flooded), GEL, and VRLA) can be charged which you can find in cars, trucks, buses, tractors, boats, jet skis, motorcycles etc. The Bosch C3 battery charger/maintainer is designed to charge 6V/12V batteries which you can find in:

• Cars
• 6V/12V antique cars
• Motorcycles
• Light trucks
• Boats
• Jet skis
• ATVs
• RVs
• Snowmobiles

The Bosch C7 charger/maintainer is designed to charge 12V/24V batteries for vehicles with a higher power demand that you can find in:

• Cars
• Trucks
• Buses
• Antique cars
• Motorcycles
• Boats
• Tractors
• RVs
• ATVs
• Jet skis
• Snowmobiles

Yes, there are different types of lead acid batteries. These include AGM, WET, and GEL.

Lead sulfate (PbSO4) is formed during the discharge state. If a lead acid battery is not recharged immediately, the lead sulfate will begin to form hard crystals that will no longer dissolve when recharged.

Sulfation can occur if the battery is kept at low charge (below 80%) and never has the opportunity to receive a full charge. Short distance driving while running windshield wiper and electric heaters contributes to this.

Sulfation can be partially reversed by pulse conditioning.

Overcharging generates oxygen & hydrogen gas by electrolysis of water. It is charging the battery more than needed.

Charging with a high amp charger can charge the battery too quickly. Also leaving an unattended charger for too long.

Yes. Bosch charger/maintainers can be left connected to the battery because they will automatically stop charging the battery when it is fully charged. They will then continue to monitor the battery and switch to maintenance mode when the voltage drops. The battery cannot be overcharged or damaged.

No, you cannot. Bosch battery charger/maintainers use SmartAMPs Technology that automatically recognizes the voltage of the battery. If an abnormal situation occurs, such as when the voltage of battery and charger is different or when the charger is incorrectly connected or when there is an abnormal charging time, the charger switches automatically to standby mode to protect the battery from damage.

Yes, however it is not recommended because it takes a very long time to fully charge the battery.