Whether your work truck relies on a multiple-battery system or a single battery, having a reliable battery is essential to keep you on the road and power all the necessary electrical accessories. To ensure the best performance, there are important questions to consider. Are all batteries suitable for multiple-battery systems? Should you opt for conventional flooded lead acid batteries? What if you can only use one type of battery—how do you choose the best one?
Ultimately, the right battery is the one you can rely on. This entails selecting a battery that meets the application requirements, performs effectively, and has a long lifespan.
While the initial cost of conventional flooded lead acid batteries may seem lower, they can end up being more expensive in the long term. Let's delve deeper to understand the key differences between dual-purpose and conventional flooded lead acid batteries.
The fundamental technology of conventional batteries has endured for over 150 years and continues to be widely utilized, although it may not be optimal for every application.
Often termed as "starter batteries," these batteries are engineered to deliver a substantial burst of power for a brief duration, such as when starting an engine. Subsequently, the battery is recharged by the vehicle's alternator. Enclosed within a plastic outer case and cover, conventional batteries contain lead plates immersed in liquid electrolyte (dilute sulfuric acid). Unlike deep-cycle batteries, starter batteries are intended for shallow cycles only, as deep cycling can significantly shorten their lifespan.
All batteries discharge when not in use, with flooded lead acid batteries generally exhibiting a higher rate of self-discharge and being more susceptible to temperature extremes.
Maintenance requirements for conventional flooded lead acid batteries include regular water addition and terminal cleaning to eliminate corrosion. Typically, these batteries are less durable, as their cases and covers are not designed to withstand the extreme shock and vibration encountered in commercial vehicle service. Cracks in the cases may lead to acid leakage, while vibration can harm internal components. Battery performance can also be substantially impacted by extreme temperatures.
Dual purpose batteries are ideally suited for applications that require both strong cranking power and low-amp draw (cycling) service to meet the extended auxiliary power needs of electrical accessories. Among this class of battery, Absorbed Glass Mat (AGM) sealed batteries are a top performer.
AGM (Absorbent Glass Mat) batteries employ a sophisticated design where positive and negative lead plates are separated by an absorbent glass mat, holding the electrolyte in place instead of being immersed in it. These plates and separators are tightly compressed within cells and housed in a durable plastic case. This high compression minimizes the shedding of plate material during battery cycling, resulting in significantly prolonged battery life. Moreover, the compression reduces internal resistance and maximizes power output, enhancing performance especially in colder temperatures.
Dual-purpose AGM batteries, optimized for deep cycling, can charge up to five times faster and provide a depth of discharge of 80 percent. In comparison, flooded lead acid batteries offer only 50 percent depth of discharge for the same rated cycle life.
Sealed AGM batteries exhibit minimal water loss and recombine most gases within the battery. Nevertheless, the battery design includes a valve to release any excess pressure that may occur from minor gassing during charging.
AGM dual-purpose batteries offer numerous advantages over conventional batteries, and some key differences are outlined below. Consider how these benefits align with the demands of your work truck:
1. Excellent starting capability
2. Deep cycle performance
3. Longer battery life, up to three times more starts per battery
4. Low self-discharge rate
5. Up to five times faster recharging
6. Low maintenance
7. Minimized surface corrosion
8. Excellent cold weather performance
9. Reduced susceptibility to sulfation and grid corrosion
10. More durable construction, resistant to vibration
11. Non-spill design, safer handling
12. Special valves to safeguard battery lifespan
When selecting a battery for your work truck, remember the adage, "you get what you pay for." Opting for a quality dual-purpose battery will yield significant returns in terms of maintenance, performance, and battery life compared to a conventional flooded lead acid battery. Always adhere to the manufacturer’s guidelines for battery care and handling, and consult with a battery professional for any inquiries.
