11/14/2022 0 Comments Battery guard autoselect![]() The 4th stage when present, could be described as a pulse wake up call.The battery is now fully charged and the voltage will drop to approximately 13.6v (below gassing voltage of 14.4v) The float mode will guard against parasitic discharge or loss due to the maintenance of memory circuits such as radios and other electronics. This will minimise the recovery period with minimum electrolyte loss. This will maintain a given voltage and reduce current as the charge comes up. The charger will automatically click into the next stage. Often over a given time frame, the charge rate is at a constant amperage for fast recovery up to about 80%. The adaptive charger essentially has 3 steps - Bulk, Absorption and Float and sometimes as many as 8. Known for its ability to adapt to the state of charge and condition of the battery. The modern charger will automatically move into float mode and reduce the charge voltage. However, the automotive charger can be low in price but must be managed. If left on through an extended time frame, the electrolyte will evaporate to a dangerously low level - the battery will overheat and internal damage will result. However, this has been addressed these days with the Constant amperage / Constant Voltage algorithmsĪlso bear in mind, that gassing (boiling) of a lead acid battery occurs at 14.4v (at average temperatures) with exception of the Calcium battery and some earlier automotive chargers are insensitive to this. As the state of charge increases, so does the rate of charge slow and the last 20% of the charge is really slow. Loosely speaking, an older automotive charger has a fixed voltage (say 14.7v) and the amperage reduces as the battery voltage equals the charger voltage (water finds its own level). Most modern chargers have a selection switch for flooded / AGM / calcium or Gel. The Gel battery uses lower voltages than the flooded and AGM units and the calcium battery (maintenance Free) has a higher voltage. This will guard against sulphation, a process that will reduce the battery's ability to perform to its maximum specification. It's important to keep the battery in a fully charged state whether its being used or not. Note: Clamping the battery too tightly in place and compressing the pad may decrease the pad’s effectiveness.Ĭaution: This product may excrete oil and stain certain surfaces and is recommended for placement in battery trays or boxes only.Charging your battery must be done with the correct equipment and to achieve this there are many chargers available to us. This condition reduces the flow of amps which are required to power electrical components.Īnother cause of performance fading is the physical collision of battery plates as a result of shock and vibration. This condition causes a short in a cell or cells. This also, may cause a battery to have low voltage and insufficient power. Scientific explanation: When a battery is subjected to extreme vibration and shock, cracks occur at the interface of mechanical joints inside the battery and its cells. While some batteries are designed to withstand these forces better than others, all batteries can be damaged by shock and vibration over time.īattery failure will often be preceded by performance fading. This is because the stress of shock and vibration causes micro fractures inside the battery which reduce internal conductivity and cause a battery to have low voltage. Over time, as the micro fractures continue to propagate in the battery’s conductive components, internal resistances increase. ![]()
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