Vibration can reduce the life of your car battery, so it is vital that you always use an approved battery clamp to ensure it is properly held down at all times. Maintain your car’s battery power by driving it frequently and for longer periods of time – and if you don’t use your car very often, consider investing in a battery charger to help maintain the correct voltage. So if you are only driving a short distance it will be impossible for the battery to regain the amount of power lost – and if you repeat the process daily the battery voltage will reduce steadily until it can no longer start the car. Your battery is given a workout every time you start your car, but is then recharged by the engine during the journey. On average you can expect a lead-acid battery to last around 42 months, but this time-frame will vary depending on a number of variables – such as hot or cold climates, journey lengths and the performance of your car’s charging circuit.īut regardless of what conditions your car is subjected to, here are 7 tips you can consider to help get the very best out of your battery. Just like the battery in your mobile phone or laptop, lead-acid car batteries have a limited life span and will eventually lose their ability to hold sufficient charge to start your car. We’ve all been there at some point in our lives, and the problem is often made worse from the fact that with modern vehicles there is little to no warning signs shown prior – and probably a 50% chance that it’ll occur while you’re out and about away from home. just harder on the battery for a day.When it comes to cars there’s nothing worse than being stuck with a flat battery. but I haven't had an issue just going for a drive immediately. Disconnecting the maintainer and waiting for the car overnight to recalculate the batteries actual SOC prevents the car from charging at 100%. However I've still found the Ford documentation to still be applicable even with the above. Placing the maintainer after this sensor like on the strut tower helps the car take into account the extra power. Many GM vehicles uses the same style system. difference between a Battery Tender and a dumb Trickle Charger for example.Īs a few other folks pointed out - there is a BMS inductive ring sensor on the ground cable that helps the car determine the battery's state of charge (SOC). Part of the reason for a BMS is to extend the life of a battery by supplying the best possible power at the correct time. Traditional dumb charging systems are definitely much less flexible and are apt to overvoltage scenarios. AKA the car thinks that battery went dead even thought it's been charged. I haven't seen the message on the mustang but during my data logs after the car sitting on a maintainer for a month and going immediately for a drive - I have noticed that the car charges at almost 15V. If the vehicle is used before the BCM is allowed to learn the new battery state of charge, engine off load shedding can still occur and a message may be displayed.Īs everyone else pointed out - the same applies for any smart charge/battery management system (BMS) Ford or any other manufacturer that isn't using an old school dumb charging system including GM. If the reset is not carried out, when the battery is charged by connecting the charger to the negative battery terminal, it takes approximately 8 hours for the BCM to learn the new battery state of charge.ĭuring this 8 hour period, the vehicle must be undisturbed, with no doors opened or keyless entry button presses. This reset is needed for proper engine off load shedding and to prevent invoking of engine off load shedding earlier than normal. In this instance, the BMS Reset must be carried out using a diagnostic scan tool. When charging the vehicle battery by connecting the charger to the negative battery terminal is necessary, such as when using a combination battery charger and battery tester/analyzer, like the GR 1 190 V3.0 Intelligent Diagnostic Charger, the BCM does not immediately update the battery state of charge. Through this method of charging the BCM updates the battery state of charge during the charging process. In this instance, after charging, the BMS Reset is not required. When charging the vehicle battery by connecting the charger to engine or chassis ground, the negative charger clamp must be connected to an unpainted chassis surface or a solid engine component such as a generator mount or engine lifting eye.
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