Diehard 71219 Smart Battery Charger Review [2023]

April 10, 2023
7.3Expert Score
Diehard 71219 Smart Battery Charger Review

The DieHard 71219 Smart Battery Charger is a technologically advanced device that promises to deliver an efficient and reliable charging experience. This battery charger is designed for all types of 12-volt lead-acid batteries, including AGM, gel cell, and deep cycle batteries.

Home Use
  • It's really well priced considering the features and brand
  • Works well on cars, motocycles, boats, and lawn mowers
  • Well constructed manual
  • Easy to use
  • Leads aren't particularly long.
  • The terminal rings have the potential to be too small
  • Clamps are weak and small

It features a microprocessor-controlled system that monitors the voltage and adjusts the charging rate accordingly for optimal performance and safety. The DieHard 71219 Smart Battery Charger offers multiple charging modes, including trickle charge, fast charge, and maintain mode, which makes it suitable for a wide range of applications.

The device is equipped with an LCD display that provides real-time information on the charging status, battery voltage, and error codes. Additionally, it comes with several safety features such as reverse polarity protection, overcharge protection, and spark-proof technology to prevent accidents during the charging process.

In this article, we will review the DieHard 71219 Smart Battery Charger in detail to help you make an informed decision before purchasing one.

Compatibility With Different Battery Types

Battery compatibility is an essential feature when selecting a smart battery charger. The DieHard 71219 Smart Battery Charger is designed to charge and maintain batteries for cars, trucks, motorcycles, boats, and lawn tractors with 6-ampere output.

It can support different types of lead-acid batteries such as AGM, Gel Cell, Deep Cycle, and Standard Flooded batteries. The charger features microprocessor-controlled technology that detects the battery type and adjusts the charging current accordingly to ensure safe charging while maximizing the battery life.

The charging efficiency of the DieHard 71219 Smart Battery Charger is commendable. The microprocessor-controlled system ensures that the battery receives a full charge by monitoring its status throughout the charging process. It switches automatically to maintenance mode once it detects a full charge cycle to prevent overcharging or undercharging of the battery.

This feature helps to extend the lifespan of your battery while ensuring optimal performance when starting your vehicle or operating other devices that rely on it. In summary, the compatibility with different types of lead-acid batteries and efficient charging capacity make DieHard 71219 Smart Battery Charger a reliable option for maintaining your vehicle’s battery health.

Moving forward into discussing its microprocessor-controlled charging system, this smart charger offers advanced features that are beneficial for battery maintenance purposes.

Microprocessor-Controlled Charging System

The use of microprocessor-controlled charging systems has brought about a significant improvement in battery charging technology. This system is designed to ensure the battery is charged efficiently and effectively, eliminating the need for manual supervision. The ability to control voltage and current allows for precise charging, ensuring that the battery receives only what it requires. This feature helps prevent overcharging or undercharging, which can cause irreversible damage to batteries.

One of the advantages of using microprocessor-controlled charging systems is their versatility. They can be used for different types of batteries, including lead-acid, gel cell, and AGM batteries. The system automatically detects the type of battery being charged and adjusts the charge rate accordingly. However, these systems have limitations as well. They require a power source to function correctly, meaning they cannot be used as backup chargers in case of power outages or emergencies. Additionally, they may not be compatible with older or damaged batteries that require specific charging procedures.

The multiple charging modes available with microprocessor-controlled charging systems are a notable feature that enhances their efficiency. These modes include float mode, absorption mode, and bulk mode. Each mode serves a specific purpose in ensuring proper battery maintenance by adjusting voltage and current levels during different phases of the charging process.

The float mode maintains a constant voltage level once the battery is fully charged while absorption mode increases voltage gradually to achieve maximum charge capacity. Lastly, the bulk mode charges at a high rate until reaching 80%, then switches to absorption mode until fully charged. These modes help prolong battery life by preventing overcharging or undercharging while maintaining optimal performance levels throughout its lifespan.

Multiple Charging Modes

The DieHard 71219 Smart Battery Charger offers multiple charging modes to cater to different types of batteries. The charger has a custom charging mode that enables users to set charging parameters specific to their battery type, such as the voltage and amperage. This feature allows for more efficient charging since it prevents overcharging or undercharging of the battery, which can shorten its lifespan. Moreover, the charger also has a quick charge mode that charges a battery in half the time compared to regular charging modes. This is especially useful for emergencies or situations where a quick charge is needed.

In terms of energy efficiency, the DieHard 71219 Smart Battery Charger is designed with an automatic voltage detection feature that determines the appropriate voltage level for each battery type. This helps prevent energy wastage by only delivering the necessary amount of power needed for a particular battery. Additionally, the charger has a maintenance mode that keeps batteries at optimal levels without overcharging them, saving energy and extending their lifespan even further. With these features combined, users can be assured that their batteries are getting charged efficiently while minimizing their carbon footprint.

Moving forward, let us take a look at another notable feature of the DieHard 71219 Smart Battery Charger – its LCD display for real-time information on battery status and charging progress.

Lcd Display For Real-Time Information

The diehard 71219 smart battery charger comes equipped with an LCD display that provides real-time information to the user.

This feature offers several benefits to the user, including the ability to monitor the charging progress, voltage levels, and charge status of the battery.

With this information readily available on the screen, users can make informed decisions about when to unplug the charger or switch to a different mode.

In comparison with traditional battery chargers without an LCD display, this feature is a significant upgrade.

Traditional chargers provide little or no feedback on charging status or voltage levels, which can lead to overcharging or undercharging of batteries.

The real-time information provided by the LCD screen in the diehard 71219 smart battery charger ensures that users can take proactive steps to extend battery life and prevent damage caused by overcharging or undercharging.

Safety Features For Accident Prevention

As mentioned in the previous section, the diehard 71219 smart battery charger comes with an easy-to-read LCD display that provides real-time information about the charging process. However, no matter how convenient this feature may be, it must not compromise safety during use.

Fortunately, this charger has some important safety features that prevent accidents from happening. One of the most crucial safety features of the diehard 71219 smart battery charger is overcharging prevention. Overcharging can cause serious damage to your battery and even lead to explosions or fires. This charger has a built-in mechanism that detects when the battery is fully charged and automatically switches off to prevent overcharging.

Additionally, it also has short circuit protection which prevents any electrical mishaps that could endanger you or your vehicle. In summary, with these safety features in place, you can feel confident using this charger without worrying about any potential risks or hazards.

In conclusion, while having an LCD display for real-time information is a great feature for a battery charger, it should never come at the expense of safety. The diehard 71219 smart battery charger ensures that its users are protected from overcharging and short circuit incidents through its advanced safety features. By investing in this high-quality battery charger, you can rest assured that you will get reliable performance and safe charging every time you need it.


The DieHard 71219 Smart Battery Charger is a reliable and efficient tool for charging and maintaining the charge of batteries. It is capable of fully charging a dead battery within a reasonable amount of time and can also be used to maintain the charge of a battery over an extended period.

Moreover, it comes with safety features that make it safe to leave the battery connected overnight. Compared to other battery chargers on the market, the DieHard 71219 Smart Battery Charger is reasonably priced and offers useful features such as microprocessor control, automatic voltage detection, and reverse hookup protection.

Overall, the DieHard 71219 Smart Battery Charger is an excellent investment for those who want a dependable charger that can handle various types of batteries efficiently.


James Olive
Zena Racing.com