My (2) 18volt Milwaukee Tool batteries will not come up to charge.
I believe it to be the charger. While the red light does come on the fact that neither battery will charge make me think its the charger. This all happened recently as I have had no problem then all of a sudden I do. I don't want to buy a charger if its the batts or visa versa. How can I test my charger to see if it is the culprit? Thanks Mike L
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Sometimes, this is a result of a battery that is too cold (below freezing-warm it up). Sometimes it can be too hot (discharged under heavy stress-let it cool down). Sometimes there may be insufficient voltage, I have had problems in older houses, get closer to the electrical panel to plug in, or you may have to wait until you get home. Red flashing may mean https://www.youtube.com/watch?v=8rZqYmPsZycthe charger or battery is to hot and must cool down before it will charge. The charger will not charge a battery if the lights are flashing. Solid Red light means it is charging and solid green light means it is charged. Plug the charger in first before putting the battery on the charger. If the charger has been dropped or hit the floor the coil inside could have broke loose and damaged the charger requiring it to be replaced. Below is an unconventional way to charge the battery if the charger is no good. BE CAREFUL how to charge broken makita BL1830 Li ion battery
depending on the saw you bought, (or other tool) some come with what is called a "rapid charger" and some come with a small "trickle" charger. most cordless tool batteries take about 1 to 1 1/2 hour to charge (from empty) using a rapid type, the trickle charger will take up to 8 hours to charge a battery. if you want fast, but the rapid charger, and usuallly when you buy one you can get a free battery with the deal.
It sounds like you drained the batteries down as far as they will go. This happened to me and then I purchased the 18V Lithium-Ion battery and charger. I was able to re-charge the drained battery on the new charger. This may work for you as well. They cheapest solution for you is to just purchase a new battery.
sound to me like you have a bad battery, a lot of ryobi batterys don't last like they should i have had the same problem, but my battery was less than a year old and i took it back and they give me a new one.
My batteries also would not charge and I thought it was the charger. I then used some fine sandpaper and cleaned up the connectors on the batteries and I now have one charging. I will try the other one as soon as the first one is done. It looks like the charger doesn't contact the battery in the same places as the tools and they get dirty. I love my set and don't want to loose them. I just don't use them enough to need charging often.
The battery is failing and is starting to degrade. If you can't get it to take a full charge, you might want to mark it for use in your flashlight only, but eventually, the battery won't take any charge and you'll have to replace it.
The good news is the the Ryobi battery tools have the lowest cost of rechargeable batteries in the marketplace. I believe you can purchase a 2 pack at Home Depot for under $40.00 which is very inexpensive for two (2) Ni-Cad batteries.
If you battery is from a new tool set, just simply contact Ryobi Customer Service and they'll address the problem with a replacement. If the batteries are ones you've been using for awhile, then go for the replacement.
NiCad batteries should be used until the tool slows down to the point where you can't use it. Then remove the battery from the tool and allow it to cool down for about 15-20 minutes before placing it in the charger. This will provide the maximum working life for your batteries.
When you use a battery powered tool, the battery gets warm/hot as it discharges, and then it gets heated up during the recharging process, so letting it cool down after using it, will prolong the useful life of that battery.
ok you need to zap the battery, if you have a jump box or a battery charger that has at least a 20 amp or better charge selection, like a engine start feature.
the post of the cordless batter has a center post marked on the sides is a plus or minus sign. the should also be some vertical slits in the plastic post on the corners, clamp the leads from the jump box or battery charger positive to positive , negative to negative. with the car battery charger you can probably slip one side of the battery clip in the plastic slot the other on the connection blade. plug in the battery charger and let it on for 5 or 6 minutes. if the battery charger has a auto shutoff the light will blink off and on but that is ok .
take the cables off and plug into the battery pack charger now you should get a red charge light and now can charge the battery.
if light does not come on try it in the drill or saw and see if you had any more charge than before if so you might need to repeat the procedure and leave it on the car battery charger a little longer
try pitting battery in charge and wiggle the battery a little to see if the green light comes on, sometimes the make contact and then loose it when you let go of the battery.if still same problem charger is probbly dead.
For others with the same problem (flashing red light won't go off)...make sure you FIRMLY PUSH the battery down onto the charger and engage the latches. Simply resting the battery on the charger will not work.