Hi i have a makita charger that flashes red and green indicating battery is no good but the batteries are perfect they charge fine on other charges an i even tried it with a brand new battery it starts charging for around 30sec then flashes red green what do you think is wrong with it note charger is only around 6 months old to

Question 1

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I have two Makita chargers and three batteries of various ages. battery chargers no longer charge the batteries.

Do you leave them plugged into the mains all the time? Voltage spike possibly.

They can be repaired, but you need the model number in the search query.

https://www.google.com/search?q=Makita+charger+repair

..

Jul 21, 2023 • Makita Drills

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Battery charger flashes red and green indicating that the batteries are bad but they charge just fine on other makita chargers

battery are dad but some charge in this battery this reason of light on

Jan 04, 2016 • Makita Tools & Hardware - Others

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Makita bl1830 charges but stays on static red light

Be the first to answer Apr 03, 2013 • Makita 2 Bl1830 18v Battery,dc18ra Charger...

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Makita battery charger wont charge

If both lights on the charger are flashing it is indicating you have a bad battery and the charger will not charge the battery. The charger has circuitry that tests the battery and if it 'thinks' the battery is defective it will not attempt to charge it. The only way to verify whether it's the battery or charger is to try charging your battery on another charger or try charging another battery on your charger. Most of the time it's a bad battery.

Aug 02, 2012 • Makita DC18RAX230 230-Volt LXT Lithium-Ion...

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My dc18ra makita battery charger flashes red and green lights no matter how many bateries i try

The pcb inside the battery has a microcontroller that monitor the charges and charge cycle. When the cell falls below a certain voltage, it will instruct the charger not to charge and will show with a red-green flashing light. If the battery has been tried 3 times in succession then the pcb will brick itself from the makita charger. So first replace the bad cells. There are 2 solutions at this moment: charge with a 3rd party lithium charger like the imax b6 or replace the pcb with a working one. check out my blog on http://mkbl1830.blogspot.com/

Mar 17, 2012 • Makita 2 Bl1830 18v Battery,dc18ra Charger...

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I have makita bl1830 battery 18volt it works fine but will not charge, charger lights flash red and green therefore battery will not charge

If both red and green lights are flashing after you put the battery on the charger, the charger is reading the battery as bad or defective and it will not charge the battery. It may be because there is a short in the battery, one of the cells is bad or the battery is just old and won't charge anymore.

Feb 01, 2011 • Makita 2 Bl1830 18v Battery,dc18ra Charger...

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Red and green light flashing on 5 of my bl11830 battaries and they will not take a charge

If you put a battery on your charger and both red and green lights flash it is indicating that battery is defective. There may be a short in the battery or they just may be too old and worn out to charge anymore. If the charger is reading the battery as defective it will not charge the battery. The only fix is to buy new batteries.

Jan 20, 2011 • Makita 2 Bl1830 18v Battery,dc18ra Charger...

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Hi both red and green lights are flashing and it wont charge battery bl1830 lith ion

If both lights are flashing it means the battery is defective so it won't charge it. By defective it could mean the battery is just worn out or there may be a short in the battery. If the battery is under warranty you can get it replaced at a Makita Service Center, if not you have to buy a new battery.

Sep 13, 2010 • Makita 2 Bl1830 18v Battery,dc18ra Charger...

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When put on charge the green and red light flash

Yep, not the batteries, mine is doing the same thing but my second charger works fine with the same batteries

Jan 19, 2010 • Makita 2 Bl1830 18v Battery,dc18ra Charger...

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Need to know what the lights mean on a makita dc24sa charger

• When the battery cartridge is inserted, the charging light color will change from green to red and charging will begin.
The charging light will remain lit steadily during charging.
• One red charging light indicates charged condition in 0 – 80% and two red ones indicates 80 – 100%.
• With finish of charge, the charging lights will change from two red ones to two green ones.
• The charging time is as follows:
Battery B9017A, BH1220, BH1420, BH9020A: approx. 20 minutes.
Battery B2417, BH1233, BH1433, BH2420, BH9033A: approx. 30 minutes.
Battery B2430, BH2433: approx. 60 minutes.

Nov 20, 2008 • Makita DC24SA 24 Volt Makstar Battery...

Question 2

Anonymous

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Posted on Feb 02, 2011

Anonymous

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There is a problem with the charger and given the age I would take it to an authorized dealer and get a replacement. If you give me your general area I will try and locate one close to you. Please before voting if you need more assistance let me know. Thank you

2 more comments
Anonymous Feb 05, 2011

No, that is NOT the problem.. The problem is Makita as well as others (even Dell laptops) have a chip inside the battery. When it hits a certain criteria it will no longer allow the batts to charge. I KNOW this is true because I took one apart after it had a full charge - ran for 5-10 minutes then just stopped. When I replaced it on the charger the dreaded red-green flash.. It is all a gimmick - They tell you the battery(s) will last longer, BULL! I now have to go spend almost the cost of the drill to get a new battery !
Anonymous Feb 05, 2011

The battery charger is date coded so they should be able to determine its age from that. Makita is generally good about taking care of their customers. I used to work for them and they want to keep end users satisfied. And the other comment about the chip is feasible but you indicated that you tried the batterys in another charger but no problem so that is what I am going on. some of the lithium-ion batterys have a chip that a scanner can read to determine the condition and how many recharges
Anonymous Feb 05, 2011

I appreciate what you are saying bigmack but I read the problem the asker posted and HE tried the batterys in ANOTHER charger without a problem so it would INDICATE a charger problem.
Anonymous Feb 09, 2011

OK, NOW I get it.. I never really thought about the charger issue.. My drill came with two batts - both a little over 18 months old. I guess I will try and locate another charger and give them a try!!! Thanks for the info!!

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