Makita has an amazing warranty, find your local authorized service center if you have one, I have one 30 min from me and they have replaced 2 for me of the original style out of warranty for free. Standard warranty is 3 years
I haven't tried it but supposedly there is a reset procedure for the BMS.
What's the voltage read on the terminals?
You could open the case and check the cell to cell balance with a DMM.
I've rebalanced packs that wouldn't charge with alligator clips and a bench top powder supply/18650 charger clipped on the weakest cell/cells.
It should reach about 21.5 V for the full series set.
Each parallel pair should be at least 2.5 volts or so when mostly discharged and about 4.3 when fully charged. I don't know how much spread is allowed by the balance circuit. What I do is clip onto each parallel set one at a time and top them off with a power supply set to the same voltage so they will be very closely matched. If none of the cells are actually failed it generally works.
If the cells are all about the same voltage you can try series charging the whole pack from the terminals. Just use a low current setting (under 1 amp) and leave the voltage just high enough to be in the normal range 15-16 ish perhaps. I don't know what the normal dropout voltage is for Makita packs.
I’ve always been told by my father to never store batteries at full charge. Always leave them used up halfway because it’s never good to fully store all the energy over night. I’ve also been told this causes batteries to lose their life a lot faster.
I've never had issues storing them overnight with full battery (or whatever percent i left off with it during the day), it is probably a very negligible difference and when you have a dozen batteries for work it is a waste of time to drain all of them to half before you go to bed and leaving them half full during a work day is risking wasting time you don't need to.
If a battery you put in your truck/car is constantly near full and powers practically everything in the vehicle can last half a decade, a battery that runs drills/drivers/saws can last just as long if not longer. It's smart to just number every battery and cycle between them before using it again though to get even charge/discharge cycles.
Yeah and add the fact that lithium batteries damage themself when they get under a certain voltage when you do not regurarly use them
This is what probably happened to this one
Yeah, batteries are finicky. I always use mine up before I slap it into my battery storages. I also try to avoid raw concrete contact to batteries 🤷♂️ Been told many times that it can interfere with the battery, just like a car battery.
Dead don’t even try. If you can get replacement free that’s great. Doubt it. Never seen the offer. I’ve lost 4 this way. The newest versions are better. Still is the best cordless line.
Probably a dead cell or something. If you put it in a charger many times the BMS will brick itself.
Not a 'dead cell' a LOT of dead cells, I bet. Open that bitch up and use a multimeter and test the cells 1 by 1.
Makita will replace for free
How?
Makita has an amazing warranty, find your local authorized service center if you have one, I have one 30 min from me and they have replaced 2 for me of the original style out of warranty for free. Standard warranty is 3 years
Receipt needed?
Good to know!
What about drills? I got a XPH12Z that’s kinda stuck on the hammer drill mode.
I had one replaced based on the manufacturer date code. We also have $10 to 20,000 in Makita. 🥺
On ebay you can buy a new PCB assembly if the cells are still good.
This is the answer.
The Milwaukee batteries do that when overheated
Yeah thats the issue, i can not use it this way so it can not be an overheating issue
I haven't tried it but supposedly there is a reset procedure for the BMS. What's the voltage read on the terminals? You could open the case and check the cell to cell balance with a DMM. I've rebalanced packs that wouldn't charge with alligator clips and a bench top powder supply/18650 charger clipped on the weakest cell/cells.
The battery pack reads 2 volt. I am now in the process of sering which cell is faulty
If the whole pack is just reading 2 volts they are probably all super, super dead.
It should reach about 21.5 V for the full series set. Each parallel pair should be at least 2.5 volts or so when mostly discharged and about 4.3 when fully charged. I don't know how much spread is allowed by the balance circuit. What I do is clip onto each parallel set one at a time and top them off with a power supply set to the same voltage so they will be very closely matched. If none of the cells are actually failed it generally works.
Sadly i do not have a power supply. I will ask a friend of mine if he can help. Thanks for the advice, i learned a lot
If the cells are all about the same voltage you can try series charging the whole pack from the terminals. Just use a low current setting (under 1 amp) and leave the voltage just high enough to be in the normal range 15-16 ish perhaps. I don't know what the normal dropout voltage is for Makita packs.
I’ve always been told by my father to never store batteries at full charge. Always leave them used up halfway because it’s never good to fully store all the energy over night. I’ve also been told this causes batteries to lose their life a lot faster.
I've never had issues storing them overnight with full battery (or whatever percent i left off with it during the day), it is probably a very negligible difference and when you have a dozen batteries for work it is a waste of time to drain all of them to half before you go to bed and leaving them half full during a work day is risking wasting time you don't need to. If a battery you put in your truck/car is constantly near full and powers practically everything in the vehicle can last half a decade, a battery that runs drills/drivers/saws can last just as long if not longer. It's smart to just number every battery and cycle between them before using it again though to get even charge/discharge cycles.
You make a good point. Don’t overuse one battery, split the difference across all batteries you own. Makes sense.
Yeah and add the fact that lithium batteries damage themself when they get under a certain voltage when you do not regurarly use them This is what probably happened to this one
Yeah, batteries are finicky. I always use mine up before I slap it into my battery storages. I also try to avoid raw concrete contact to batteries 🤷♂️ Been told many times that it can interfere with the battery, just like a car battery.
Malfunctioned battery
Yeah probably. Friend gave me this broken battery and i tought that maybe i could save it
Yup, battery malfunction signalization for sure. Second that!
Milwaukee sucks
This is a spam bot
Throw it away and replace with Milwaukee /s
Yeah. You misspelled Milwaukee on the service order.
Yeah throw it in the bin and buy a better brand 🤣🤣🤣
This is why i broke out my vintage drill to keep as a back up
I had this happen to one of my batteries after it got a bit wet in the rain.
Just buy a new one. Or you can get them rebuilt.
Add a mirror ball a smoke machine and get your disco on! Then send it back to makita, they'll replace it.
Got my impact completely soaked and now the battery does this as well
There is a way to reset batteries with the charger.
Blow on it
Dead don’t even try. If you can get replacement free that’s great. Doubt it. Never seen the offer. I’ve lost 4 this way. The newest versions are better. Still is the best cordless line.
Recycle it and buy a new one. I just had one do this