![]() Keeping the battery charged over 50% ensures it doesn’t get depleted. You can use household cleaner on a cloth or a specifically designed battery cleaning spray to remove the dirt. ![]() It’s necessary to clean this off because it pulls energy away from the product. Over time, you may notice that dust and debris build up on the battery terminals. A steady power source allows the battery to remain at about 13.6 to 13.8 volts, which keeps it at an optimal level without over or under-charging. You find these in vehicles where an alternator charges the battery and solar chargers. Some batteries are connected to a continued source of energy that provides recharging. In this example, a 100 amp battery cannot provide 200 amps of power for 30 minutes. Most batteries have a maximum amp and cannot give more power than rated because it overheats. For example, a 100 amp battery lasts five hours when a connected device draws 20 amps per hour, or 10 hours if it only draws 10 amps per hour. An amp is a time measurement that lets you know approximately how long the battery can last on a full charge. Various 12 volt batteries are rated for different amps. A battery can be used repeatedly over many years and recharged numerous times with proper care. The time a battery lasts depends on the amount of energy an attached device is withdrawing, how charged the battery was before use, and if there is an automatic recharging source. The following is an approximate value of how charged the battery is based on the voltage readout: Your digital meter can then display the current voltage. To take an accurate reading, remove any devices that pull power from the battery and let it rest for a minimum of 12 hours. However, if you want a precise measurement to the tenth of a volt, purchase a digital meter. These meters let you know the status of the component to an approximate value. Many devices that depend on a 12 volt battery have a voltage gauge attached. This can be up to 180 times for a golf cart and as low as 20 times for a car. A rechargeable battery can only last through so many deep discharges before you can no longer replenish it. This indicates that the part has been deep-discharged. If you must use a battery in an emergency and don’t charge it, the resting voltage can get as low as 12.1 volts before drawing out all power. Ideally, a 12 volt battery shouldn’t be allowed below 50% of its power, or 12.5 volts, before recharging. The voltage diminishes without a constant charge as the attached device draws out the battery's energy. It can stay at this voltage for only a few seconds unless you keep it plugged into a charging device. This gives maximum power to the item requiring energy. Immediately after a 12 volt battery is charged in full, it can read up to 14 volts. To know what the voltage of your battery is, you should take a measurement once it has rested for a few days after charging. When a product of this type is completely charged, it should measure approximately 12.6 volts between the terminals. What Should a 12 Volt Battery Read When Fully Charged?Ī 12 volt battery is the name given to a unique style of battery, but its voltage is more than 12 volts. This is vital, especially in cases where there are boating applications and a substantial amount of water could ruin the battery. Further, a portable 12 volt battery is usually sealed in a case so that it is waterproof. This is because it is more likely to be transported between uses and consumers will not choose to carry a large, bulky battery. In such cases where a 12 volt portable battery is used to replace an onboard 12 volt battery, it is usually lighter than a standard version. Therefore, running things like fish finders and oxygenators off a separate battery is the only way to do it.Īlternators charge a vehicle's battery and supply its electrical system with power. Smaller craft with smaller outboard motors may have a pull start and therefore have no need of an electrical system for its main motor. While such electronic devices can be run using an electrical system onboard a boat, there are some anglers who do not have an onboard electrical system. Many manufacturers have attempted over the years to reduce the size of the 12 volt battery to one that is easily portable, as some outdoors enthusiasts like to use them to run things like fish finders.Ī portable 12 volt battery is usually sealed in a waterproof case. Non-rechargeable batteries can become quite expensive if they must be purchased regularly. However, it may be recommended to use a rechargeable battery if the electronic item is one that is used regularly. This battery is often used in various outdoor applications that require greater amounts of energy in order to operate as desired. A 12 volt battery is available as a non-rechargeable alkaline battery or in rechargeable forms.
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