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Battery--cordless tools in general have become very popular. I used a battery-cordless grease gun when I worked at The Bus Plant. In that environment--used every day, charged every night--it was fine.
I refuse to own another battery-cordless tool in my hobby-shop. The batteries are always dead when I want to use the tool, or I have to keep them on the charger for weeks at a time between uses...and then the batteries stop holding a charge.
I have NO use for battery-cordless tools. God bless home-made fresh-squeezed air, or plain ol' plug-the-cord into-the-outlet electric tools.