See full version: What Amperage Do You Need to Charge a Car Battery, 2 Amps or 10 Amps
A basic car battery charger usually charges at 2 amperes. On average, car batteries hold 48 ampere-hours, so it typically takes a full day to charge a car battery. However, there are other car battery charging solutions that offer up to 10 amperes.
Fast charging is not usually recommended, as it can damage the battery plates. Car batteries also have a separate type of ampere — the cold crank ampere — that refers to the amount of power the battery can supply to start the engine. Depending on the manufacturer, a car battery can generate anywhere between 400 and 1,500 cold crank amperes.
Since most EV drivers charge overnight, this is not a significant difference, especially when the car stays plugged in for 8 to 10 hours. Another factor to consider is the initial cost to power a 40A EVSE vs a 30A EVSE can be very substantial. That's because the entire circuit needs to use a thicker wire, and the circuit breaker needed is more expensive. Plus, many residential electrical systems do not have the spare electrical capacity to add a 40A charger, since it requires a 50-amp dedicated circuit. more
The average daily distance North Americans drive is between 26-31 miles. For electric vehicles, this requires about 10 kWh of electricity (Most EVs average between 3 & 4 miles per kWh. Charging an EV at 40 A (9.6 kW) means it will take a little more than one hour to charge to the minimum required daily amount, compared to 1 hour and 20 minutes at 30 A (7.2 kW).
That can be confusing to some consumers shopping for a charging station, so let's take a closer look at what the difference between a 30-amp unit and one that can deliver 40-amps.
When shopping for a home charging station, make sure you get all the features and quality you need. However, make sure you're not paying for an option that your EV can't use, will cost you more to install, and may not even be compatible with your home's electrical supply. FLO Home charging stations deliver up to 30A, which is more than enough power to fully charge your EV overnight, and have you ready to go the next morning.
As the auto industry increasingly shifts to EVs, combined with the fact that the average family owns two vehicles, it is probable that two EVSEs per household will soon be the norm. Even if the present capacity allows starting with a 40A EVSE, it will certainly be a challenge for any household to add a second one in the future. Two 30A power sharing-enabled units (drawing a combined maximum of 32A) to charge two family EVs is more cost-efficient than to have to swap the charging connector from one vehicle to another every evening. [links]
It’s OK to use, but it may not charge as quickly, or if you’re using the laptop, it may not charge at all. here
My tomtom worked fine until I used wrong in car charger.Now it won’t start even after mains charge and resets.The charger is input DC=12v. Output DC=10.5v fuse 5A PositiveCentre pin. Tomtom label 5v DC 2A positive pin.Have I “cooked” the battery or worse? here
My power bank’s rated power input is 5V , 1A. But when I am using a 5V 1A charger, the charger heats up fast. (And smells foul when I am very near it) When I tried using a 0.7 A charger, the heat is moderate, and on a 0.5A charger, the temperature is normal. What should I use then? [links]
Most power supplies provide their output on two wires: one labeled (+) or positive, and the other (-) or negative. Which wire is which is referred to as polarity.
Particularly when it comes to popular circular power connectors, make sure the expectations match. If the device expects the center connector to be positive and the outer ring to be negative, your power supply’s connector must match. There’s no getting around this.
If you use a 2 amp setting, the needle will settle at the end of the small red triangle. [links]
Never place the charger directly above or below the battery. here
The goal is to get the water from the charger tank to the battery tank. more
The best way to know this is to leave it on for the recommended charging time or watch the indicator on your charger to see if it is fully charged. [links]
This will prevent the creation of arcs on the battery terminal and thus avoid the danger of explosion.
High-quality battery chargers include a number of safety features that prevent the battery from overcharging, as well as provide information on the battery’s status and condition.