I recently purchased the Pi Car along with the Robot HAT which also had a battery. The battery was a dual 3.7v lithium ion 18650. I would like to purchase an additional battery but cannot find the original battery (with 3 wires) as a separate item to purchase. Can I buy another battery pack?
You can try to contact the after sell service at service@sunfounder.com . They should add a section into store for spare parts.