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Lead-acid cell has a life of nearly charges and discharges
500
700
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1250
Quick Summary: A lead-acid battery is a secondary cell that typically undergoes approximately 1250 charge and discharge cycles during its operational lifespan before degradation renders it ineffective. The life is determined by the number of cycles it can sustain before the plate material (active material) sheds or the grid corrodes excessively.
A lead-acid battery is a secondary cell that typically undergoes approximately 1250 charge and discharge cycles during its operational lifespan before degradation renders it ineffective. The life is determined by the number of cycles it can sustain before the plate material (active material) sheds or the grid corrodes excessively.
Cycle┬аLife=Energy┬аper┬аCycleTotal┬аEnergy┬аDeliveredтАЛ тАФ represents the conceptual limit of battery life based on discharge throughput.
Pb+PbO2тАЛ+2H2тАЛSO4тАЛтЗМ2PbSO4тАЛ+2H2тАЛO тАФ the reversible chemical reaction in a lead-acid cell.
During discharge, chemical energy is converted to electrical energy as both lead dioxide (positive plate) and spongy lead (negative plate) react with sulfuric acid to form lead sulfate. During charging, this process is reversed by an external DC supply, converting lead sulfate back into active materials. Over time, physical strain, sulfation, and material shedding reduce the battery's capacity, eventually leading to end-of-life.
Lead-acid batteries are classified as secondary cells, meaning they are rechargeable.
Cycle life depends heavily on Depth of Discharge (DoD); higher DoD reduces total cycle life.
Common maintenance practices like equalization charging can extend the life of lead-acid banks.
Sulfation is the primary failure mode if batteries are left in a discharged state for long periods.
Low cost per watt-hour
High surge current capability
Reliable and widely understood technology
Low energy-to-weight ratio
Requires regular maintenance (electrolyte level check)
Slow charging time to avoid gassing
Automotive starting, lighting, and ignition (SLI) systems
Uninterruptible Power Supplies (UPS) and standby power systems
The 1250 cycle estimate is a nominal industry average for high-quality stationary lead-acid cells under controlled operating temperatures (25┬░C).
Options like 500 or 700 are often cited for specific types of deep-cycle batteries with higher depths of discharge.
D is correct тАФ The standard rated life of a robust lead-acid battery is approximately 1250 charge and discharge cycles under optimal operating conditions.
Always relate battery cycle life to Depth of Discharge (DoD) in exams; most lead-acid batteries have a non-linear relationship where deeper discharges drastically shorten the total cycle count.