You can probaby get away with the battery for a while.
However, you can spend $40 on a charger now, or $50 on a new battery and $40 on a new charger when the cheap one that comes with the gun cooks the battery.
You get what you pay for in this hobby.
"Someone in a Prius tried to race me at a stop sign the other day. I couldn't believe it. I had him for the first 100 feet or so but I can only walk so fast."