Scorpion Anti Spark DIY kit for 2S to 16S battery systems. It will help you in any case of spark issues.
The set includes a PTC resettable fuse which will avoid sparks during connecting your battery.
A detailed manual of how to install it is included as well as attached on this page for download.
PTC resettable fuse *1
Plastic tube *1
Heat Shrink tube *1
Weight including packaging