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How long to Charge a car Battery at 2 amps. Charging your car battery with a 2 amp car battery charger will take a reasonably long time, up to 24 hours to reach an acceptable charge, this is determined by the fact that your car battery is usually 48 amps and it takes about 1 amp charge … The six amp is going to charge the battery noticably faster, not a lot but you will see the difference if you are on a time crunch. Larger chargers may be used to decrease charge time, but may decrease battery life. A 12 Watt Charger can supply about 2.4 Amps and the same voltage of about 5.1 Volts.
This type of amp power is generally used during a trickle charge or to maintain your battery at a specific level.

Fully charging a completely discharged automotive battery, for example, with a 10-amp charger may take approximately 6-10 hours at a temperature of 80°F. Length Of Time Using 2 amps . At the speed of 2 amps per hour, it will take the charger about 24 hours to provide a 48 amp charge to your battery. The 10 amp charge is a great starting charge for when the battery is almost completely depleted of energy, but as the battery gains power then the charging amps should be switched to a 2 amp charge so the battery slowly finishes receiving the final amount of charge that it needs. Can You Plug A 30 Amp To A 50 Amp? An automotive battery 5-amp to 10-amp is considered a slow charge while 20-amp or above is generally considered a fast charge. That means that the charger will increase your battery power by about 2 amps for each hour that it is connected. Overcharging a battery can lead to all sort of problems: The electrolyte may boil, the battery can overheat and buckle the plates and, in extreme cases, the battery may even blow up, especially if excess hydrogen gas is released and there’s a spark handy. Determine Charge Time By Rate Of Charge And Amp Hours Needed You can definitely do it. Example: 10 Watt, 18 Volt Solar Panel charging a 12V, 10 Amp hour Lead Acid Battery (120 Wh) from 50% full to Full – Time = 60Wh x 2 / 10 Watts = 12 hours. When i first plugged it in, it was plugged in for 2 minutes before i plugged it in to the Battery (then it lights up "Connected") and i plugged it in and set it on 2 Amps.. it said 75% them Complete within 2 minutes. FWIW, the charge times here are with the stock .750 amp charger 0-100% AnandTech - Motorola Droid RAZR MAXX Review - 1.8x The Battery 4.217 hours I just drained as far under 5% as I could and then put it on a 1.0 amp charger, pretty darn close to fully discharged. Step 3: If you charge your battery at a 10-amp rate and you need to replace 36 amp-hours in the battery. Smaller chargers are fine for long term floating, e.g. Some quick rules for estimation: Therefore it is necessary to put about 30 amp hours plus 20% more to compensate for the internal resistance in the battery for a total of 30 amps x 0.2 = 36 amp-hours to fully charge your battery. This is usually due to the 2-amp battery providing 1 ampere per hour. Do you want to charge RV battery with a generator. Charing your car with a 2-amp battery will take 1-2 days to reach a full recharge. Lower ambient temperatures require a longer charge time. a 1 or 2 amp "smart charger" can be used for battery The typical charger charges your battery at about 2 amps. Ultimately the GoPro camera itself is going to convert the voltage down a bit for charging purposes, but you can charge a 3.7V battery and 5 Volts without harm to the battery, and 2 to 2.4 Amps is well within the charging range of a 1050mAh Li-Ion battery pack. Environmental Factors Will Likely Increase Charge Time. Battery charges provide different amps.
Add that value to the original needed charge rate and you get 36 amp hours. The 2-amp charge rate is intended for small batteries such as motorcycles, snowmobiles and lawn garden tractors. Now, i wonder.. My Charger is small and Plugs into the wall, and it can charge at 2 Amps, 4 Amps, and 6 Amps. The ideal range of amp is 10 for a battery. 3. Consequently, when trying to charge a larger battery at that rate, it will take a very long time and the battery may discharge at a greater rate than the 2-amp charge can provide. But if you want a fast charging opportunity, can use at best 20 amp. The solar charge times above assume a 25 degree Celsius day with the panel pointed directly at the sun. 30 amp hours multiplied by 0.2 (20 percent) is 6 amp hours. Meaning that a 20-amp battery should be charged at no more than 2 amps over a 10-hour period. Thus, a 100 ah battery would take about a 25 amp charger (or less). This is the amount of amp hours you actually need to charge the battery in our example. It’s not unusable to plug a 30 amp to a 50 amp plug anyhow.