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Deep discharge of lead-acid batteries refers to the process where the battery is drained of its charge to a very low voltage level, typically below 20-30% of its total capacity. In other words, it means using most of the battery's stored energy until it is nearly empty.
For lead-acid batteries, deep discharge is generally harmful because it can shorten the battery’s lifespan and reduce its ability to hold a charge. Lead-acid batteries are designed to be used with shallow discharges (using only a small portion of the battery's capacity), and frequent deep discharges can lead to:
To maximize the lifespan of a lead-acid battery, it's generally recommended to avoid deep discharges and recharge the battery when it gets to around 40-50% of its capacity.
For lead-acid batteries, deep discharge is generally harmful because it can shorten the battery’s lifespan and reduce its ability to hold a charge. Lead-acid batteries are designed to be used with shallow discharges (using only a small portion of the battery's capacity), and frequent deep discharges can lead to:
- Sulfation: This is the formation of lead sulfate crystals on the battery's plates, which reduces the battery’s efficiency and capacity over time.
- Internal damage: Deep discharges cause the battery plates to undergo more strain, which can physically damage them, leading to reduced performance.
- Reduced lifespan: Repeated deep discharges cause the battery to wear out faster, meaning it won't last as long as it would with proper usage.
To maximize the lifespan of a lead-acid battery, it's generally recommended to avoid deep discharges and recharge the battery when it gets to around 40-50% of its capacity.