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.
Testimonial: "thank you verry helpfull"
Mine is doing the same but if i used my other charger my batteries charge fine
bingo! thats my situation,also.....and I do not need some flunky to instruct me to go to the service centre.....D'uh! lol
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I found that there is a thermister in the battery.
Then placed my battery on a radiator for while, then
it charged. Batteries had been in a cold garage.
Instead of throwing away your tools you can connect it with 18v adapter to make it work thats the last option that i will ever choose.
kind of not an option,when your 30 ft. up,installing on a building,thats why I need cord-LESS
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I have( 4) 3 amp 18 volt lithium ion batteries for makita tools that will not charge. the charger flashes red and green at me, at 100 $ a piece , i might as well throw the battery saw, impact and cordless in the F' in trash can!! oh and its been just over a year since i bought them
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