You can use any newer WORX 18v battery. This thing cuts through wood like butter. Now about the chainsaw, it works great. Well balanced, even with the 4 amp battery. The first job was a trash palm tree.
WORX WG384 Features & Specs
Quick-stop chain brake to help prevent accidental cutting
Twin 20V power share batteries deliver 40V maximum power and performance
Highly efficient Brushless motor design for longer lasting power
Patented auto-tension chain system extends life of bar & chain
Automatic chain lubrication with oil lever indicator for easy operation
Dual-port charger lets you charge two batteries within one hour
Editor's Impressions Of The WORX WG384
Cutting Power
Tool Motor Power
Chain Alignment
Value For Money
Build Quality
Feature Set
WORX WG384 Final Thoughts
"I am very impressed."
And as I said, I don't front as an expert. But in fairness, there is no other choice. Now about the chainsaw, it works great. Lasts 3 - 4 hrs and have used it 5 times so far. The first job was a trash palm tree.