From what I can find, the company is out of business in the U.S. The product is made in china and that company probably makes many of the off name brands out there. The last battery I bought cost $44.99 six years ago and has been used about a total of 4 times a year until depleted and the recharged. It is starting to charge less each time and is at about 20 minutes per charge. If you are a DC power wizard, you can probably open the batter and replace the series batteries inside to create a new Gardenline slide in. (and battery made for cordless power tools should have the same setup inside).
Ivanhoe M.
April 2022