Recent content by Tintaglia

Thanks for all your help :-)

Yes, I would certainly hate to blow up the battery now!! I think we will try this tomorrow after a good night's sleep :-) Thanks for your input.

No, please, welcome to the party, the more the merrier :-) Where would we need to solder? Can we just bridge it to test it?

The red wire closer to the middle of the board is the input wire, we don't know what the thin red wire does. When the battery is on charge is shows the same voltage as the other two red wires.

I'm not sure which one I mean!! Our meter has a resistance setting which makes an audible noise if there is no break in a wire. It is labelled as 200 ohms. That is what we used to test c139, when we put the probes at each end it did not make a noise. There is no reading on the meter at any...

Hi Danidl, the right hand red wire is actually the input from the charger, the middle wire is the output to the batteries. There is no transfer of the charge between the right hand and middle wires. The device c139 has no resistance between the two ends, does that sound right to you? Nealh...

Thanks again. Hope these are clear enough. We suspect the middle red wire and may try to resolder it tomorrow if we can dig out the necessary tools but generally any advice as to where we can check for current would be great but there's no urgency now we've got some charge into the battery.

The good news is that we've got the battery charging!! We've been fiddling about this afternoon checking voltages, the charging wires lead into a separate little circuit board and the upshot was that there is current on the wire coming in from the charger but not on the one leaving. We've...

It has 4 pins which according to Flecc's excellent article represent 1) charge monitoring, 2) negative, 3) battery meter and 4) charging positive. Without the battery connected there is only a small voltage between pins 1 and 4 and nothing between any of the others. With the battery connected...

Measuring between which pins? Using the obvious + and - ones as marked on the charger I get nothing but on the outside pins (+ and charge monitoring?) I get a small voltage. I have checked 3 chargers and get the same result on all of them, except for a variation between 4v and 10v measuring...

Good news that you think the battery might be healthy :-) The charger is measuring 29.2 when plugged in with the battery connected and 25 when unplugged with the battery still connected. It measures 0 when the battery is not connected. I get the same measurements on two different chargers.

I've taken the readings again connected to two different chargers and they are all identical to when it isn't on charge. To confirm it is an 8ah 25.2v Kalkhoff lithium ion battery which is showing 2 charge lights and 5 battery condition lights.

Doh, that's so obvious when you say them in the right order, no wonder I never do any good at those cryptic maths problems!! I will get the voltages while on charge and post back.

Thanks for the replies, sorry about the delay replying, only just got home. That test gives an interesting set of results, starting at the top left by the red wires and going round anticlockwise I get: 18v, 10.8v, 3.5v, 7.2v, 14.4v and 21.7v and still a total voltage of 25.3 They sound like...