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Flooded Lead-Acid Batteries

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Trojan Motive T-105 225Ah 6V Flooded ELPT/EUT Deep-Cycle Battery with Bayonet Cap

  • AMP Hours225Ah
  • TypeLead Acid

Pickup on Tue, Dec 23 from Ft. Myers, FL

Delivery on Dec 29 – Jan 02

In stock

Trojan Motive T-875 170Ah 8V Flooded ELPT Deep-Cycle Battery with Bayonet Cap

  • AMP Hours170Ah
  • TypeLead Acid

Pickup on Tue, Dec 23 from Ft. Myers, FL

Delivery on Dec 29 – Jan 02

In stock

Trojan Motive T-1275 150Ah 12V Flooded ELPT Deep-Cycle Battery with Master Vent

  • AMP Hours150Ah
  • TypeLead Acid

Pickup on Tue, Dec 23 from Miami, FL

Delivery on Dec 29 – Jan 02

In stock

MK Battery DEKA 8L16-DEKA Flooded Lead-Acid Storage Battery 6V

  • AMP Hours370Ah
  • TypeLead Acid

Delivery on Dec 29 – Jan 02

  • Overview
  • Articles

Lead Acid Battery for Your Needs

Lead acid batteries power over 400 million vehicles and backup systems annually, yet choosing the wrong type costs businesses thousands in premature replacements and downtime. Understanding construction types, capacity ratings, and maintenance requirements ensures reliable performance and maximum return on investment.

How do lead acid batteries actually work?

Lead acid batteries use reversible chemical reactions between lead dioxide cathodes, metallic lead anodes, and sulfuric acid electrolyte. During discharge, both electrodes convert to lead sulfate, releasing 2.1 volts per cell. Charging reverses this process. Incomplete charging creates sulfate crystals that reduce capacity—the main reason batteries fail prematurely.

Flooded vs AGM vs Gel: Which Battery Type Saves You Money?

Flooded batteries offer the lowest upfront cost and work well for stationary applications with regular maintenance access. AGM (Absorbed Glass Mat) batteries eliminate maintenance, resist vibration, and reduce self-discharge to 1-3% monthly versus 5-15% for flooded types. Gel batteries excel in deep-cycle applications but cost 80-100% more than flooded alternatives.

TypeCycle LifeMaintenanceBest ForPrice
Flooded300-500Every 30-90 daysStationary backup$
AGM400-700NoneAutomotive, marine$$
Gel500-1,200NoneSolar, deep cycle$$$
What battery capacity do you really need?

Cold Cranking Amps (CCA) determines starting power at 0°F—critical for winter reliability. Reserve Capacity (RC) shows how long accessories run with a failed alternator. Amp-hours (Ah) indicate total energy storage. Match these specs to your equipment requirements, not price alone.

CapacityVehiclesBackup PowerTypical CCA
35-50 AhMotorcycles, ATVsSmall alarm systems200-350
50-75 AhCompact carsHome security400-600
75-100 AhMid-size vehiclesOffice servers650-850
100-200 AhTrucks, SUVsIndustrial UPS800-1,000
Expert Tip

Temperature kills battery capacity. At 32°F, a 100Ah battery delivers only 75Ah. For outdoor installations, multiply your calculated capacity by 1.4 to maintain adequate performance during winter months.

Battery Council International

Proper charging extends battery life by 200%

Voltage precision matters more than charge speed. Flooded batteries need 14.4-14.8V bulk charging, then 13.2-13.5V float maintenance. AGM batteries require tighter tolerances: 14.4-14.7V bulk, 13.5-13.8V float. Most vehicle alternators lack this precision—smart chargers pay for themselves in extended battery life.

Charging StageFloodedAGMGel
Bulk14.4-14.8V14.4-14.7V14.1-14.4V
Float13.2-13.5V13.5-13.8V13.5-13.8V
Why does discharge depth matter for your budget?

Shallow discharges triple battery lifespan. A battery discharged to 50% delivers 600 cycles; limited to 30% delivers 1,200 cycles. For daily-use systems, oversizing capacity by 2× costs less than replacing undersized batteries twice as often.

Discharge DepthCycle LifeTotal EnergyCost Efficiency
100%200-300BaselinePoor
50%600-8001.5× baselineBest
30%1,200-1,5001.8× baselineExcellent

Three warning signs your battery needs replacement now

Voltage recovery testing reveals hidden problems. Healthy batteries recover to 12.4V within one hour after 50% discharge. Readings below 12.0V indicate sulfation damage. Specific gravity variance exceeding 0.050 points between cells signals irreversible failure. Terminal voltage dropping below 9.6V during load testing means replacement is overdue.

Expert Tip

Avoid battery additives and desulfation devices. They provide temporary improvement while accelerating internal damage. With recycling returning 60% of purchase cost, proper replacement delivers better economics than attempted repairs.

Interstate Batteries Technical Services

♻️ Environmental responsibility: Lead acid batteries achieve 99% recycling rates—the highest of any consumer product. Return your old battery when purchasing a replacement to ensure proper processing and receive core credit.

Need Help Choosing the Right Battery?

Our battery specialists help you match capacity, type, and specifications to your exact application—ensuring maximum performance and lifespan while avoiding costly oversizing or premature failure.

Shop Lead Acid Battery

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