I am trying to help a friend out with a problem with a strimmer.
The item has an 18v Ni-CD battery and is charged with a Bosch AL60DV 2411 7.2 - 24v charger.
The problem is we don't know if the charger isn't charging or, if it is, the battery isn't holding the charge.
There seems to be 4 connectors on the battery, three of them are flat plates that are approximately 10mm square, there is one each side of the part that slots into the charger with one on the radiused part if it, the 4th one is a small pin that is on the + side. This pin doesn't seem to connect to anything in the charger and I don't have the actual strimmer with me at the moment so can't tell if there is a corresponding connector in the tool. If I put the multimeter on the two flat plates on the side, I am getting a reading of 19.51v which to my mind seems quite good. I also get this same reading if I put the probes on the + plate on the side and on the flat plate on the radiused part.
What sort of reading should I be getting from the actual charger? If I put the probes on the two connectors that come into contact with the side plates, all I am getting is a reading of 0.01v
I have attached a couple of images that may be of some help. Thank you for any help that may be offered.