Hi Den
Ebay number is 313953533334. My trimmer was 12 volt. When you open the pack you will find 3 rows of batteries plus one to one side. they are wrapped in card 3 batteries to each row. The batteries you get all have soft metal tags top and bottom which take solder with no problem. I used some flux and electrical solder. Solder up 3 batteries in series in each of the 3 rows.I wrapped mine in duct tape to hold them together, plus one to the side making 12 volt in all. When you open up the pack you will see where all the wires go. Slice one of the rows open then you can see how it is put together. The batteries are a little shorter then the originals but are the same diameter. I was amazed how easy it was to do. If you have any problems let me know. Ian