How much do extra batteries cost? Ella at SwiftPaws April 21, 2020 21:10 Updated Right now we do not offer additional batteries for sale. But it may be possible to get compatible batteries at a local hobby store or online. See our article on where to find them HERE. Related articles I need extra batteries, where can I find them? We have multiple dogs. The battery doesn’t last long enough. What can we do? My SwiftPaws is too slow - I expected it to be faster - what can I do? How can I reorder supplies (line, etc.) How can I tell if the Remote Control unit is charged?