![]() Limiting the current in this way can not only help to prolong the life of your battery, but in some cases help recondition completely flat batteries to give 70-80% of the performance of a brand-new battery. Instead of dumping in all the power at once, many smart chargers assess the condition of the battery and complete a controlled charging cycle which uses microprocessors to ramp up the amps through a series of stages. Many of these can safely charge the 6v battery in your lawnmower or a 24v HGV battery, too. Some will also have auto detection, so they’ll know which type of battery is connected as soon as they’re hooked up. While it’s not an issue with lead acid batteries anyway, the vast majority of chargers on sale nowadays have a smart charging circuit at the very least, so will be able to handle all types of car battery. Instead, you’ll need a relatively modern smart charger to do the job. An old manual 12-volt charger won’t charge these sealed units. Although there are still a whole load of conventional lead acid car batteries out there, plenty of the more modern cars – especially those with stop/start technology or modified motors with massive audio systems – utilize EFB (enhanced flooded battery) or AGM (absorbent glass matt) batteries. ![]() Step 1: Get the right battery chargerįirst and foremost, this will depend on the battery you have in the car. Whether you have a battery problem right now, you’re looking at simple car maintenance or you intend to store your project and keep the battery in decent useable condition, here’s our step-by-step guide on how to charge your car battery, including all the things to look out for. It makes sense to check and charge yours periodically, especially if you happen to make loads of short journeys. Winter temperatures also plays havoc with car batteries, cutting down on their ability to hold a charge or crank out sufficient power to start your car. It can take up to 8-hours of constant driving to top up a flat battery to around 60% capacity. Whatever the reason, it’s worth remembering that a standard car alternator will likely never fully charge any car battery, even on a long run. But, then again, it’s worth considering that nearly half of all breakdowns are due to an insufficiently charged battery, too. Many experts recommend replacing your battery after 3 years or so of normal use, which we all do, right? Of course we don’t! Here in the real world, car batteries are replaced when they start to struggle, we’ve all been there. The other fact is that most car batteries will only last four or five years at best. It’s surprising how often these small human mistakes can happen. From leaving the lights on overnight, blasting your subwoofers without the ignition on, or simply old age (that’s the battery, not you). There are all sorts of reasons why your car battery can go flat. Here’s how you can charge your car battery, and what to look out for along the way. Car struggling to start? Your battery may be needing a top up then.
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