Wednesday, December 11, 2013
Can I Charge a 7AH SLA Battery With a 10AH Charger
Charging a 7 amp hour (AH) sealed lead acid (SLA) battery with a 10AH charger can be done, but it is detrimental to the health of your battery. Charging a battery with the wrong charger results in overcharging or undercharging.
Amp Hours
The capacity of a 7AH battery is significantly less than a 10AH battery. Since the 10AH battery holds a greater capacity, its charger provides an increased electrical flow. Using a 10AH charger with a 7AH battery results in overcharging. Unplugging the battery early results in undercharging.
Overcharging
Overcharging is caused by thermal runaway. Increased voltage will decompose the water in the electrolytes of the battery. Overheating occurs, allowing more voltage to enter the battery. Overcharging ages batteries very quickly.
Undercharging
Undercharging occurs when lower voltage is applied to a battery. Charging ends early and lead sulfate adheres to the electrodes. Due to the remaining lead sulfate, capacity is reduced. Removing a battery early also results in an incomplete charge. The risk of residual lead sulfate damage is still present. Charge your batteries completely to avoid diminished capacity.
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