As you know from a previous post, a battery converts chemical energy stored in it to electrical power. Once the chemical, or more specifically the electrolyte , of the battery is used up, the battery gets discharged. A battery charger is a device that does exactly this. It uses electric current to regenerate the used up electrolyte in a battery. The batteries that can be recharged using battery chargers are called rechargeable batteries.
A battery charger is always manufactured for a specific battery. The charger is rated in terms of the amount of current it will provide and hence time it will take to fully charge the battery. Charge or discharge rate of a battery is measured in terms of C or C-rate Charge Rate. Dongguan Greenway Battery Co. Cheng District, Dongguan, China. A battery charger is a device used to provide energy to battery cells by letting the electricity current pass through it.
In other words, a battery charger is a device that provides direct current to batteries replacing the electrolyte that has been used up. Basically, a battery charger works by providing electric current to batteries for a certain time where the cells are expected to hold the energy provided to them by the chargers.
The basic function of a battery charger is to restore a battery's capacity, and the best battery charger for restoring capacity is the automatic charger; however, one should also understand its downfalls.
The battery charger is normally protected against overcurrent and overheating. How do you know if your battery charger work? There are different types of chargers used in various devices, such as computers, cell phones, and cars, among others. Battery chargers work differently in each device, and in most, they may work by connecting the battery to the charger or also by putting the battery inside the charger.
The simplest way to know whether your battery charger works properly is by testing it on batteries. The first step is to ensure that your charger is connected to an electrical outlet ensuring there are no batteries at the moment. Secondly, turn on your voltmeter unit and thirdly, connect your cell batteries to your charger and ensure the batteries used are compatible with your battery charger.
Check our independent rechargeable batteries reviews to find the best batteries for your device. Smart battery chargers are usually the best choice for keeping rechargeable batteries in good shape, as they prevent overcharging, which can reduce battery lifetime.
Some have timers, so they turn off automatically after a set period of time. However, keeping them constantly topped up also increases the likelihood of overcharging. So you risk overcharging, which can cause long-term damage. Excess energy can cause batteries to get hot. The type of battery charger that's best for you will depend on how you plan to charge your batteries, and how much you want to spend.
Can you plan ahead to recharge your batteries? Manufacturers claim that the fastest battery chargers can charge in just 15 minutes, but they usually cost more.
The slowest are often cheaper, but need to be left overnight. Our rechargeable batteries tests measure how long different brands take to charge. Battery charging technology is constantly evolving, and many smart chargers are claimed to charge batteries in under an hour. They tend to be pricier than other battery chargers, however.
Exactly how long it will take depends on the capacity of your rechargeable batteries. In the same charger, higher-capacity batteries will take longer to charge than lower-capacity ones. The older 12 volt charger would feature a fixed charging voltage, high enough to "force" energy amps into the battery. The lower the initial battery voltage state of discharge , the easier this forcing process is, so you may see the amp meter if so equipped run up to the charger's maximum output amperage, and stay there a while.
As battery resistance rises, as it does as the state of charge increases, the harder it is for the 12 volt charger to force the amps in, so the amp rate decreases.
Eventually, the charger reaches a point where it's output voltage can't force any more into the battery, so current almost stops, but depending on where this voltage point is, it may be high enough to overcharge over time, or keep the battery in the gassing stage, drying out a flooded type battery.
These chargers should be monitored for this reason, and disconnected when the amp meter drops to the low point. The "smart chargers" are profiled with contemporary charging philosophy in mind, and also take information from the battery to provide maximum charge benefit with minimum observation. Some gel cell and AGM batteries may require special settings or chargers. True Gel batteries generally require a specific charge profile, and a gel specific or gel selectable or gel suitable charger is called for.
The peak charging voltage for Gel batteries is 2. Exceeding this voltage in a Gel battery can cause bubbles in the electrolyte gel, and permanent damage, as the bubbles do not dissipate when the over voltage condition ceases. The target voltage for a 12 volt charger for AGM or some flooded batteries is 2. Some flooded cells will tolerate over 15 volts.
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