Question about Makita 2 Bl1830 18v Battery,dc18ra Charger Lxt Fr Drill

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Hi, My BL1830 battery is brandnew eventhought I bought the coreless 2 years ago and the problem is the battery which wont charge red and green light flash on and off when on charge. Wondering if someone can help.Thank you.

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You need to recycle it in the charger. do you have a button on the charger to do that with? If not try switching chargers.

Posted on Feb 26, 2011

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Posted on Jan 02, 2017

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1 Answer

Makita bl1830 charges but stays on static red light


Chargers have been known to lie about what they are indicating. Even though you say the batteries were charged only a hanful of times, they may, in fact, have expired

Apr 03, 2013 | Makita 2 Bl1830 18v Battery,dc18ra Charger...

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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...

1 Answer

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...

4 Answers

Can my makita bl1830 battery be repaired if it does not hold charge anymore


This battery has a known design defect that causes premature failure. The battery is still probably good, but the safety circuit n the battery spuriously locks it, due to a bug. Once locked, it won't charge in the Makita charger (flashing red and green lights). Makita knows about this problem but so far is not actively recalling the batteries. Makita will replace the pack if the charge count is under 150 (some people say 300?) regardless of warranty status, but you have to take or mail it to a Makita Service Center -- the dealers won't handle this unless it's in warranty.
http://www.makita.com/en-us/Modules/Service/ServiceCenters.aspx

If Makita won't fix it, you can try to repair it. If the red and green lights are flashing, the battery is probably locked and cannot be repaired in a way that will let it be charged in the Makita charger (but it can be charged in off brand chargers). Buy a clone charger on eBay for $60 and try it. If it charges, just use it, no repair needed.

Be aware that lithium batteries do lose capacity permanently at a rate of about 20% per year. So, 3-6 years is about the best battery life you can expect - from date of manufacture, so if it sat in the store a while that adds. Makita derates the cells to allow for some shelf life (down from 2400 Mah to 1500 Mah rating).

If the battery is weak, and only gives brief usage, you can replace some of or all of the cells in the battery. These are expensive and worth repairing. See this video:
http://www.youtube.com/watch?v=Z5taguEdlkY

If just 1 or 2 cells are weak, you can replace them with the same Sony 18650 size 2400 Mah capacity battery, green sleeve. The Sony's are not sold retail, and are hard to find other than from another Makita pack or from some laptop packs. If more are weak, you're better off just replacing all of them with new 18650 2400 Mah (or higher) batteries with tabs. Look for Tenergy or other quality brand.

Hope that helps.

Nov 02, 2010 | Makita 2 Bl1830 18v Battery,dc18ra Charger...

4 Answers

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...

1 Answer

Hi, My Makita DC18RA won't charge anything it just flashers the red and green light simultaneously it is not the batteries because I can charge them fine using anther charger. What is wrong with the...


none of these answers help. you cant return old chargers to the store, and the poster said his battery charged on a different charger. i have the same problem with 2 makita battery chargers and need to know if there is a part inside the charger that can be replaced.

May 16, 2010 | Makita 2 Bl1830 18v Battery,dc18ra Charger...

3 Answers

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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