@myacidninja1025
Side note: you can also power a cb radio this way if you dont have an easily accessible way to hook it up
@valleywrenchin
Thanks everyone for the love and support!
@kaylendunagan1695
Dad did this trick on one of my porter cable batteries. It did work and it hasn’t had the issue since.
@TheGameboy57
After working with batteries for a while. I've found that the main reason is the cells becoming out of balance and a balance charge from a proper battery charger brings the batteries back to near new condition. It was a major problem on the 9 amp batteries and after balancing them they have remained in balance for far longer than before
@RangerOfTheOrder
This works in a pinch, but there are better ways that don't risk damaging the existing battery.
@spartanoffroad
120k views! keep it going man
@TheCustomFHD
Best not to do it like this. It will work, but Lithium Batterys can output super high Currents, especially in a low Resistance things, or charging other Lithium cells. You need to current limit to not damage the cells of both batteries. You can do this with a strong resistor, or using a adjustable power supply.
@motodude23
Someone is gonna burn their house down with this, there is usually a reason they fail. Only situation this will work is if you left a low/dead battery sit for a long time. They have protection circuits for a reason lol they aren't trying to scam you, lithium fires are no joke
@robster7787
You dont even need to let it sit. It jumps almost immediately when I do it. Wire it up just like in the video and unplug it after a second. This method also works for Dewalt as well. I literally dug through my old toolbox just to verify. Yup it works.
@Joey-labs-official
Be careful, the lithium polymer cells that make up these batteries are not designed to be discharged past a certain rate and become volatile. Please exercise, extreme caution when doing this, as it can cause them to spontaneously combust
@ToolsTrucksTrails
Nice tip!
@MoparFab
I bought 9 of these batteries and all of them gave me me the blinking light of death and tried this on all of them. They all work. That was 3 years ago. These batteries also work well for jumping off a vehicle.
@anger9984
Workmate: my batteries dead you got one? Me: nah fam grab the wires
@coupons420
MY ROYOBI NEVER NEEDS THIS! GREAT TOOLS BUB
@stephaniedupeyronxalfredot2670
No se que dice pero hay dos razones para eso. La batería tiene tiempo que no se usa, o las celdas están en desequilibrio y hay que equilibrar
@Tatoebot
You should use the same amp hr battery. This is a old trick
@devilsinthedetailss
just make sure theres a fuse in-line. i blew a 30 amp 3 times and it started charging afterwords!
@SilntObsvr
The "defective battery" report on most lithium chargers is triggered by a battery that's below 1 volt per cell (for these 18V batteries, that would be an output voltage below 6 volts -- because LiFePO4 cells are nominally 3.2 or so volts when fully charged, there are six in a pack. If you can get enough charge into the pack to bring the pack voltage above 1 volt per cell, the charger will be able to charge it -- but this can also go horribly wrong. If the battery that won't charge has a shorted cell, you can burn up the wires, vent a cell (permanent loss of capacity and corrosion from the electrolyte getting where it isn't wanted), or even cause an explosion. Shorted cells are less common in LiFePO4 batteries like those used in power tools than in the old nickel-cadmium or nickel metal hydride chemistry, or even in lithium-ion -- which is part of why these are used almost exclusively for power tools -- but they can still happen.
@jackstandsandoilpans6687
Yea you went past the low cut off so you need to give the cells a lil jump so thr charger will see over 3.7v per cell.
@s73v36