Where is the date code on makita batteries - Makita Drills

On the Makita 18-V DC18RA charger, the flashing red light means that the battery is not at the correct temperature for safe charging. If the battery is hot (from use or being in direct sunlight), charging will begin when the battery cools down. If the battery is cold, then charging will start when the battery warms up. (Note: the cold battery could have moisture condensation issues. This could delay the start of the charging cycle.) Home Depot has the manual for this charger here: https://images.homedepot-static.com/catalog/pdfimages/35/35393127-7c0b-4668-8609-9104ae7cc187.pdf . I suspect that Makita uses the same "code" on all of their chargers.

I hope this helps.

Cindy Wells

The date can be found with the serial number. Look up that number online and it will let you know when it was made. You can call Makita direct as well and they will help you.

Some of the Makita 18v LXT tools require the BL1830 3.0AH battery and are designed that the 1.5AH battery will not fit.

Call Makita at 1-800-462-5482 they will sell direct. Sawzall is a Milwaukee trade name so when you call say reciprocating saw. You'll also need the serial number or date code because Makita has several revisions to that tool.

Replacement MAKITA 6391D battery pack 100% compatible with the original 6391D battery, high quality, wholesale price.

http://www.drillbattery.com.au/buybattery.php/makita_6391D_power+tool+battery.html

Hi David, there are 2 things you can do.
1) If you still have the reciept, I would take it back to Home Depot and attempt an exchange, assuming the tools look like they only have half an hour on them. That will be the quickest, if it works.
2) Follow the link below, type in your zip code and take it into your nearest Authorized Warranty Center. They will also require a receipt.

At this point it is irrelevant what is wrong with it if its under warranty. If it ends up not being under warranty for whatever reason, your assumptions are correct. It could very well be both batteries at the same time, or a faulty charger. Big box stores like Home Depot dont recycle stock the way they should. I went to a local Home Depot and found a DeWalt battery with a date code that was 4 years old.
http://www.makita.com/en-us/Modules/Service/ServiceCenters.aspx

I hope this helps, and good luck.

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.

DO NOT Take the Batteries apart, you will see nothing more than a bunch of cells and if they are less than 1 year old than they may still be covered by Makita's warranty. Makita will Void that warranty if you open the batteries. Contact their service center they should be able to tell the age of your tool from the serial number or date code stamped in the tool. http://www.makita.com/en-us/Modules/Service/ServiceCenters.aspx or 1-800-4-Makita
If they are older than a year old you are out of Luck. While you cared for your tools, Hammerdrilling in general is an abusive application for batteries and will discharge the batteries quickly and reduce the number of recharges you will get on the battery. I always recommend people always use their cordless Hammerdrills only when corded power is not available

I can't find the 1402 battery listed on the Makita website. What is the tool catalog number and I will find you a bettery that way. You can buy online at Makitatools.com and also they have a locator to find one locally that you can use. Let me know if you need more assistance.

Battery has to be cool before you put in charger,also check contacts for dirt etc..cheers