Require circuit diagram for black and decker charger 486910-25

If you're not willing to play with the circuits here, you could solve the question by going and getting just a new battery or borrowing a known good battery and seeing how the charger reacts. This will at minimum let you know if the charger is bad or if your battery is bad.

You need to post MORE information like what is it doing or not doing and how you use this charger then we can eliminate operator trouble and focus on the charger.

here is a link that may help you with your problem.

http://www.instructables.com/answers/The-red-light-on-my-Black-and-Decker-18v-cup-charg/

Porter Cable has not offered a replacement for their poorly designed 19.2V chargers. I had the same problem and happen to like my drill and circular saw. I found a universal charger called a model number CHUN-2420. Google it--I got mine for $27 plus shipping. All you need to do to make this work is splice 3 wires.

My charger is a PC model 8624, so the instructions might vary slightly between the chargers. Remove the six screws on the bottom of your PC charger. Remove the bottom section. Remove the screw(s) that attach the circuit card to the plastic housing. Disconnect the 3 pin white charging connector from the circuit card, and cutoff the connector. Discard the circuit card and power cord. Cut the 3 conductor (red/yellow/black) cable coming out of the Chun-2420 approximately 2' from the charger. Splice these three wires to the three wires in the charger housing that connect to your battery. In my situation, Red/Red, Yellow/Yellow, White/Black. To verify, red=positive, black/white=negative, yellow=temperature sensor. Wrap the red/yellow/black cable with electrical tape where it exits the PC charger through the power cord hole. Re-attach the bottom.

do a google search and enter your vector model # with black & decker and you should find the right charger. ex: vector vec010s

google search: replacement charger for black & decker vec010s
or go here http://www.stylefeeder.com/i/6sr4398f/Black-Amp-Decker-5140045-42-Replacement-A-C-Charger

MOST OF THE TIME MANUFACTURERS DOESNT SELLE DIAGRAMS,BECOZ THE WANT ONLY TO REPAIR THEIR PRODUCT BY THEIR CERTIFIED TECHNICIANS.

You can contact a Dewalt Service Center to see if they have the diagram. Black and Decker is Dewalts lower priced line. A quick search on their website did not reveal anything. They may not have the diagram. As far as I know there are no parts available for the chargers so you may have a hard time locating the diagram. Try giving Dewalt a call.

change batteries, your charger should indicate wheather you battery is good or noot on the pause inbetween blinks.

My charger has a fuse located on the circuit board inside the unit....when mine stopped working, it was the fuse...replaced it and it is working fine for one battery, the other blows the fuse every time....bad battery.

Open it and look for a fuse, then go buy a new one (my Ryobi charger didn't have a fuse)