Electric screwdriver charging flashes red and green

What the symbols on the Makita battery charger mean?

Red and green are lit steadily. Battery is low. charging. Battery is more than 80% charged. Lights up green. Battery is fully charged. Red and green flashing. Battery is low. Lights up yellow. The battery is being conditioned.

Also, what is the difference between the Makita bl1830 and bl1830b?

Makita BL1830 18V lithium-ion battery 3.0 Ah. MAK-BL1830B. Lithium-ion BL1830B has no memory effect and is much lighter than batteries of other chemistries. 22-minute recharging in the DC18RC charger, and battery capacity indicator LEDs that tell you how much power you have left, at the touch of a button.

So what does the Makita LXT mean? Makita. Technology. LXT. Xtreme Lithium-ion technology. LXT.

How long does a 3ds battery last?

Battery life will vary depending on screen brightness and usage. Average duration will be 3-5 hours when playing Nintendo 3DS software and 5-8 hours when playing Nintendo DS software.

electric, screwdriver, charging, flashes, green

Charging time depends on which battery you have installed. Compact 1.5 Ah takes 15 minutes to charge, but it has a shorter run time, while the 3.0Ah is 30 charged, but has an extended run time.

Electric screwdriver battery malfunction detection and recovery

Before you start repairing the battery, you should determine its fault, otherwise the repair will be quite difficult or completely impossible. It should be noted that the failure of all cells simultaneously battery is not possible, except in rare cases where there may be a long circuit of the output terminals of the battery.

To determine the fault you should:

  • Put the battery on charge and wait until it is fully charged.
  • After that disassemble the case, and measure the voltage of each charging element. The difference in voltage across the banks for nickel cadmium batteries may be in the range of 1.2-1.4 V, and the difference for lithium batteries may be about 3.8 V.
  • Banks having voltage less than nominal should be marked. After that, the battery should be reassembled and give it a full load until a noticeable discharge.
  • Then disassemble the battery again and measure the voltage of each bank.
  • Usually the biggest voltage sag will be in the marked cells, which will need to be “resuscitated” or simply replaced.

If the electric screwdriver requires 12 V voltage to work, you can try to find faulty elements in a simpler way. To do this, you need:

  • Fully charge the battery, then disassemble it and measure the voltage of each cell.
  • Then with the help of a 12 volt bulb to discharge it completely and again measure the voltage of all the cells to determine which ones are faulty.

Instead of a light bulb, you can use a suitable voltage resistor.

Repair and replacement of electric screwdriver battery cells

The most effective method, how to restore the battery of an electric screwdriver is a simple replacement of failed charging elements, which were found during their inspection.

To make the repair, you will need a donor, that is, a second battery, which also has failed banks, if there is no such, you can buy new cells through the Internet. Today, there are enough online stores that are ready to deliver new batteries directly to your home by courier service.

electric, screwdriver, charging, flashes, green

Important. Acquired elements must match the capacity and dimensions of the elements to be replaced.

For the repair you will need to prepare: a soldering iron, tin solder and alcohol flux (preferably).

The process of changing the charging elements itself does not provide any difficulty, if only you have a skill in soldering.

Restoring an electric screwdriver battery

Warning. To avoid damaging the battery when working with the soldering iron, soldering must be done quickly.

It is recommended to use the native plates to connect the cells, and if it is impossible to use them, replace them completely with the same size, but made of copper. This is necessary for the correct charging process. If the cross section of the connecting wafers between the elements are different, they will heat up, and of course to protect the charging jars will constantly actuate a thermistor.

Care must be taken when assembling the batteries. The connection must be in series. the minus of each battery connects to the plus of the next cell.

After all the elements have been completely assembled, equalize their potentials, because they will be different at this time. For this it is necessary to carry out a certain charge/discharge cycle. The repaired battery is fully charged, after which it should rest for about one day. After one day the voltage of all cells should be measured separately, and if the assembly has been done correctly, the voltage of each cell should correspond to 1.2 V.

After that the battery should be fully discharged again. For this purpose, the assembled battery, with the electric screwdriver, is given a full maximum load until it is completely discharged. The main thing is not to overload the electric screwdriver itself, so that it does not have to be repaired in the future. This charging/discharging procedure must be repeated several times in succession.

In the same way, about every three months, it is recommended to carry out a procedure to erase the “memory effect”, which will prolong the operation of the battery and the electric screwdriver itself.

How else you can restore the cells of the battery

If for some reason you can not restore the battery by replacing the defective cells, you can try to reanimate them. Only note that this cannot be done with lithium-ion batteries. Only batteries with nickel-cadmium cells can be reanimated.

There are two ways of resuscitation:

  • with the help of a vice, a pair of pliers or a hammer to make a compression seal of the cans with the detected defect;
  • Make flashing of defective cans under high voltage.

Restoring the cans

Do not discard cans that have failed the test. Often the cause of their failure is boiling out of electrolyte or leakage of distilled water. This occurs through the sealing rubber between the middle rail of the batteries and its case. The electrolyte usually boils off when you charge it intensively.

To check if it can be restored, you must try to charge a battery that shows a complete “zero” by a pulse voltage of 12 V passed through a resistance of 40-50 ohms. But be careful not to overheat it. After charging the battery, check the voltage, and if there is still no voltage, then the battery must be completely discarded.

If there is a little tension in the battery after charging, it means it is still possible to recover. To refill the boiled down electrolyte a small hole is drilled into the side of the battery into which only a syringe needle can fit. Water or new electrolyte is injected into the battery with a syringe through this hole. The drilled hole is sealed with silicone and you can try to recharge it after a day.

Eliminating the “memory effect”

Often the battery needs to recover from the memory effect that occurs after repeated short recharges when it is not fully recharged. This disease is recognized quite simply. The battery discharges very quickly after being fully charged, but after a short pause, it can resume its work for a short time. The problem is partially solved by the following method:

  • It is advisable to fully charge the battery with a low voltage. After that, using minimal loads, it should be discharged. Minimal loads provide a slow (smooth) discharge of the battery, which allows the whole of its plates and the outer layer.

To discharge it is best to use a 12 V light bulb which is connected to the side terminals of the battery. A new charge can be made after the bulb is no longer lit.

Before using the battery for work, it is recommended to repeat the above procedure for 3-5 times. After that the capacity of the battery may decrease, but using this method of restoration is quite successful and can prolong its life for at least some time.


If after disassembling the battery it is impossible to read on the battery cells their marking, and without determining the data, quality repair is almost impossible, it is necessary to pay attention to the designation of the material of their manufacture:

  • Nickel-cadmium batteries are labeled Ni-Cd. The rated voltage of each cell is 1.2 V;
  • Ni-Mh nickel metal hydride cells are labeled as Ni-Mh. And the specified voltage is the same as the nickel-cadmium ones and is 1.2 V;
  • Li-Ion corresponds to a lithium-ion battery with a voltage of 3.6 V.

Important. When selecting new batteries to replace the defective ones, you should pay attention to their dimensions and data, which must coincide with the originals as much as possible.

What you can charge the battery from an electric screwdriver?

Usually charging time is half an hour to 7 hours, depending on the type of battery and charger. Nickel-cadmium batteries take the longest to recharge. 3 to 7 hours.

Which light should be on when charging an electric screwdriver??

Green and red. The green light is on when the charger is plugged in. A red light illuminates if a battery is connected to it, which means that the battery is in the process of being charged. As soon as the battery is charged, the charger shuts off.

Technically speaking, to determine if a bank is shorted, measure the voltage at each bank separately, using a voltmeter. You should use a fork to measure the voltage at each bank. Under load, bank voltage below 1.7 V indicates battery defect.

Resetting the memory in a NiCad battery

Milwaukee battery charger for old NiCad batteries has one red LED. Once the battery is installed, a steady light indicates that the battery is charging normally, but a flashing light indicates a problem. The battery is usually too hot to charge. If you continue to see a flashing light after the battery has cooled, the battery may be defective.

You can reset the memory in the nickel-cadmium battery so it will hold a charge again, but you need a larger power source, such as a 12-volt car battery. Connect the connecting cables to the 12-volt battery. Red to positive terminal and black to negative. Touch the end of the red cable to the positive terminal of the NiCad battery and the black cable to the. to the negative terminal for a second or two. The power surge clears the accumulated sulfates inside the battery and restores the battery.

Milwaukee Chargers, Overview

If you have a Milwaukee 18-volt lithium-ion battery charger, this is the only type of battery you should attempt to charge with this charger. Milwaukee makes a separate charger for 12-volt batteries. And, of course, other manufacturers’ batteries are not suitable for the Milwaukee charger.

The charger has compartments for both clamping and rechargeable batteries. When you put the battery in to charge, the red LED lights up and stays on constantly until the battery is charged. When charging is complete, the green light comes on and stays on.

What the flashing lights mean? The charger may display one of two warning lights when the battery is installed, and as long as they are displayed, the battery will not start charging. The first, a flashing red light, means that the battery is too hot to charge. When you see this, remove the battery; let it cool down, and try again later.

Second Warning. Blinking red and green light. May indicate that the battery is not inserted correctly, but if you are sure that it is inserted correctly, the warning may also indicate that the battery is faulty. Remove it and clean the terminals on the battery with alcohol. Then unplug the charger and clean the terminals inside the charger port. If you still see the red and green warning, you have a problem with this battery.

Quick start 18-volt lithium-ion battery

If you see the red and green light flashing and you are sure the battery is inserted correctly and the connections are clean, the battery may be low, but you can bring it back to life. This is a simple trick, but it is not recommended by the manufacturer, who recommends calling a service representative or getting a new battery instead.

Here’s a hack: put a dead battery on the table next to a good, fully charged one. Connect the appropriate terminals on each battery to each other with 14-gauge copper wire. Attach the wire to the terminals and wait one or two minutes. When you remove the wires and insert the battery into the charger, it should start charging. This does not mean the battery is as good as new. The charge may not last as long as a new one, but you’ll probably get a few more cycles out of the battery before you really have to throw it away.

Can I charge my car battery with the charger from an electric screwdriver?

Theoretically, you can charge the battery with a charger from an electric screwdriver. But you can never be sure that the charger will fit and the built-in protection will not kick in. Specialized chargers have adjustable current and voltage. So it is more efficient and safer to use them.

To measure the voltage with a multimeter, you have to put it in constant voltage mode, and set the range above the maximum voltage on a charged battery, a charged battery has about 12.7 volts, so choose. DCV, 20 volts.

How to charge a camera battery without a battery charger?

Many cameras do not have interchangeable batteries or have a recharging function without removing the battery. In order to charge the device without charging you will need a USB cable. It plugs one side to your computer or USB outlet and the other to your camera.

Charge it with a voltage equal to the sum of the maximum voltages of all the batteries. For lithium ones, it’s 4.2 volts.

Is it possible to repair the battery for an electric screwdriver without disassembling it? My experience

on the internet there are not a few examples of how you can recover a dead electric screwdriver battery without even opening it. I have two batteries lying around that can’t be recharged even if they are charged overnight.the method of recovery that I will test, suitable for batteries that are not charged by a regular device and for those that are fully charged, but their capacity is extremely low for prolonged work of the electric screwdriver.

The idea is to give the battery a briefly high current of. After that, as the authors of such ideas promise, the battery almost always comes back to work and lasts a long time.Trying to charge my batteries:

The red-green light on the charger is blinking. This means that the charger initiates the battery completely unfit for charging. The voltage on it is practically zero.Both of my batteries have this defect.Well, let’s try the recovery method.

We’ll need

I set the minimum current on the welder, in my case. 45 А. And I connect plus to plus, minus to minus.

electric, screwdriver, charging, flashes, green

No miracle: the indicator still flashes from red to green. I waited a little while just to be sure. It’s the same, nothing’s changed.Okay, let’s move on to the second battery. Let’s just give it an electric current for a little while.

How long does it take to charge an 18 volt Black and Decker battery?

It would take 6-9 hours to charge a battery with a battery charger, while a new charger would fully charge one of these new batteries in three hours.

Some chargers blink slowly, about once per second, to indicate a good charging current, and blink faster, about twice per second, to indicate a battery problem. When the charger blinking fast, will not charge what is the battery, so as not to overheat and cause a fire.

What does the portable charger blinking red mean?

Blinking blue light. The external battery to recharge your phone needs charging. Flashing red light. 111Interior Battery is charged. Solid red light. 111Interior Battery is charged. To recharge your 111V external Battery, plug what is the included micro USB cable into any USB power source (wall charger, car charger, etc. д.)

Flashing GREEN means that the charger “balances” the cells, so if one or more cells are faulty and will NOT reach 4.2 V, then the charger will keep trying.