Can I charge a 12v battery with a laptop charger?
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Can I charge a 12v battery with a laptop charger?
4 Answers. NO you cannot charge your 12V AGM battery directly with a 19V Laptop power supply. You need a battery charger. The laptop power supply IS NOT a battery charger, it is a fixed voltage SMPS power supply.
How do you charge a 12-volt battery in series?
One basic configuration for charging batteries in series is to connect the positive charger output (in red) to the positive end of one of the batteries. Then, connect the negative end of the battery to the positive end of the next one, and continue to do so for the rest of your batteries.
Can I charge 2 batteries at the same time with 12V?
If the batteries were connected in parallel, you could use a 12V charger. That’s only 24V at neg end of one battery and the pos of the other. You can charge each battery with a 12 volt charger by using the the posts of each battery separately. You don’t have to disconnect the middle jumper.
Can I use a 7AH battery instead of a 20Ah?
If you simply parallel connect the two batteries for discharging, then the combined Ah capacities do not add. As current is drawn from the paralleled batteries, the voltage of the 7Ah battery will typically drop more quickly than the 20 Ah battery. This will typically cause the higher voltage 20 Ah battery to begin charging the 7 Ah battery.
How do I charge two batteries in parallel?
The charger will see one battery ( 12 + 12 =24) and will charge the whole 24 volt battery . In parallel it sees two batteries. The charger sensor detecting a full charge from the first battery can turn the charger off, stopping the second battery from reaching a full charge. Take the warning labels off. Darwin will solve the problem.
Can I charge a 36V battery with a 12V Charger?
A 12volt charger may, perhaps, raise the terminal voltage of a completely flat 36volt battery to 12volts, or a little more, but the charge in the battery will not be significant. As soon as more than six of the cells have become polarised the supplied current will drop to zero and charging will cease.