Here are some indicators you should look for to let you know that your battery is on its last leg. There are a few key indicators to look for:
The first sign is a slow engine crank. Your engine won’t snap right to life, it will struggle to turn over or it will make a slightly different noise. Newer cars, depending on the make, model, and year may light up the ‘check engine’ light on your dashboard.
Some lead-acid batteries require that water be added to the battery in order to function properly. Maintenance free AGM and Lithium batteries do not require water to be added. Make sure to check which kind of battery you have top it off regularly if your battery needs water.
If your battery seems to be bulging out or swollen, then it’s time to replace the battery. The components inside the battery typically swell due to overcharging or short-circuiting of the battery. Overcharging can be avoided by using a smart charger with a safety time.
Cracks in the battery’s casing are another indicator that your battery is on its way out. Always follow the battery manufacturer’s instructions for proper charging, maintenance, and storage.
Even your daily driver will benefit from a smart charger every once in a while. The charger will read that voltage of your battery and bring it up to a full charge. If the battery is marginal the charger will indicate this to you right away and you will be able to prevent a dead battery leaving you stranded.