Using drill battery started getting extremly hot/ removed and it continued to get hot and started smoking. Put second battery in drill and same thing happened again. Whats Up?

Do you also have a good battery that runs the drill well to proof the drill is good, and a volt meter (multi meter)?
I have several cordless tool batteries that show the rated voltage on a meter, and register as fully charged when on the charger, that no longer have any current capacity. They will barely turn the drill and die in seconds. This is a different problem than when freshly charged run fine but lose their charge in a few days or so. That is caused by internal short circuits in some or all the cells from "dendrites", a build-up of small amounts of the cell plates as little branches growing on the plates until they reach the other plate, causing a tiny short circuit. Dendrites can sometimes can be burned off, the way I do it can be extremely dangerous and I do not recommend it. I do it by putting 4 battery chargers in series, giving me an open circuit voltage of 59 volts. I for a no more than 4 seconds connect them to the battery - to - and + to +, with a current in excess of 50 amps. The battery gets hot and could explode, so I do it by reaching around a 1/2" thick poly-carbonate shield. Lacking a shield, i use a power strip to plug the chargers in Have the power strip unplugged from the outlet or extension cord, connect the charger clips to the battery, and from a distance, plug in the power strip just for 2-3 seconds. The battery may be quite hot. I then check the battery voltage, it is usually a bit higher than the voltage rating. I put the battery in the drill and if it makes a few turns, i run it till the drill stops, then charge the battery normally. I use 2 small 12 v chargers that have a 50 amp jump-start setting and two that have a 10 amp rating.
The proper repair is to replace or rebuild them.

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Smoking battery and wires HELP - Moderated Discussion Areas ...

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Jun 13, 2008 - 10 posts - ‎5 authors
The motor started to turn BUT the battery began to smoke , the wires ... Set the dial on the continuity function and put the leads on each of your battery cables. ... Thebatteries and cables are not reported to heat up when first connected. ... button verybriefly and get ready to pull the pos cable quickly in case ...

Smoking Battery Cables - Moderated Discussion Areas - Continuous Wave

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Jul 19, 2006 - 24 posts - ‎9 authors
Are the terminals on battery cables supposed to be hot? ... amounts of resistance cause significant heating, which is why battery cables need .... Yesterday I went out and hooked up the new battery, turned the key and got absolutely nothing. ... Good thing I had the cowling off because a wire started smoking.

Why did my Jumper Cables burn in half after attempting a jump

To be sure it's the switch, check for continuity between the positive and negative contacts at the terminal block, where the battery connects to the tool, with the switch off. There should not be any continuity there, if there is the battery will have a constant draw (short circuit) on it which will cause it to overheat and smoke if left on long enough. The switch is replaceable, it's part number 487136-00 but shop internet stores, the switch is around $75 +s/h.

I am thinking the switch or motor is bad, check the switch first. you can locate parts at dewaltservicenet.com. Make a wiring diagram before removing anything, these parts are polarity sensitive.

Hi,
The only way to tell if you can fix it is to take the drill apart...
Look for two wires melted together...my guess is that they got too hot and melted together inside the drill... separate and insulate and you should be fine...


heatman101

check continuity across two pins on drill that get power from battery. If they are 'touching' or have continuity the drill is bad. It sounds like that is the case as two batteries did the same thing. Can you try the batteries in any other 18v dewalt tool? Borrow a friends if you don't have any other tools but see if batteries do the same.
Also, measure power of battery before you put it in and see how much the afterward you had it in for a second how much power it has. If it is shorted in the drill it will drain power. Sounds like a short inside drill. GL

battery start smoking & get very hot as soon as put in drill 925dc

the battery is supposed to be removed from the charger as soon as fully charged ,otherwise it will cause the battery to malfunction and eventually die

Usualy when a drill is put under extreme load the windings get hot on the armature. Sometimes the coating on the windings melts off and short together. the drill is on its last leg when this happens

cooling holes blocked
drill is being used at too hi a pressure, so the bit does not clear debris fast enough,
bit is blunt, even diamond drills blunt
the objuect being drilled is a composite, and some part of the composite is flammable
using a steel twist bit where a carbide impact bit should be used

not solution just some things to check