Batteries that lose their ability to hold a charge is a common frustration. Nevertheless, it is one that can often be resolved with proper troubleshooting and maintenance. Getting to the root cause of why a battery isn’t retaining charge is the key to resolving the issue and getting back on the road.
Check Connections and Clean Terminals
For optimal battery charging, secure connections and clean terminals are essential. Carefully inspect the cable fittings, ensuring they’re tightly fastened. If loose, use pliers to crimp the connectors securely. Additionally, examine the battery terminals for any corrosion or debris buildup and gently remove obstructions with a wire brush or a baking soda paste solution. Clearing the terminals improves electrical contact, allowing for more efficient energy transfer into the battery during the charging cycle.
Test Voltage
Evaluating your battery’s ability to retain a charge begins with a voltage test. The experts over at Clore Automotive recommend attaching a portable battery load tester onto the terminals and observe the display reading. A fully charged, robust battery should measure between 12.4-12.6 volts. Readings below 12 volts indicate an undercharged state, requiring a recharge or replacement if severely depleted. This voltage testing method helps identify whether charge retention issues originate from the battery itself or other electrical system components, isolating the root cause of the problem.
Check Age of Battery
Over time, batteries lose their ability to hold a charge because of internal chemical changes. Hot weather also speeds up battery deterioration. If your battery is older, its capacity for storing energy may simply be worn out regardless of maintenance. In that case, replacing it is the most effective solution for restoring charge capacity. When installing a new battery, go for one with the highest cold cranking amps and reserved capacity ratings that fit your vehicle to maximize lifespan.
Recharge Battery
For batteries that test low but aren’t completely drained, attempt recharging before replacement. Utilize a trickle charger, which supplies a steady, low electrical current. Connect it to your battery for several hours or overnight if necessary. These inexpensive chargers excel at maintaining batteries’ charge levels between usages. However, avoid overcharging by limiting charging sessions to a day or two maximum, as extended periods can degrade batteries over time. Once a portable tester indicates a voltage of 12.6 or higher, your battery has regained its full charge.
Check Alternator
A well-functioning alternator is crucial for your battery’s optimal performance. This component generates electricity to power accessories and recharge the battery while driving. Alternator issues can hinder proper battery charging, manifesting as dimming headlights at idle or frequent battery drain despite passing tests. To assess alternator function, start the engine and turn on electrical accessories like headlights and radio. Measure the voltage, which should exceed 13 volts. Lower readings may indicate alternator problems. Replacing a faulty alternator can restore the battery charging system’s efficiency.
Let Battery Rest After Jump Starts
Repeatedly jump starting your car when the battery is run down strains the battery, eventually shortening its lifespan and ability to hold a charge. If you’ve had to rely on jump starts more than a couple times recently, give your battery a chance to fully recharge in between drive cycles. Take it for at least a 15–30-minute drive after jump letting the alternator properly charge it. Avoid immediately turning the car off and on or cranking the starter excessively right after a jump too – this puts further strain on the already compromised battery.
Conclusion
The inability to hold charge can be annoying but easily fixable once the source is found. Following a methodical troubleshooting process through each system that interacts with your car’s battery will help uncover issues that are draining power.
