"5 Packs Charging Protector
In charge, when the current suddenly increases, destroying only the fuse(valued USD0.3), rather than your hobby.
You can choose the fuse as per your needs:
ATO * Blade Fuse Rated 32V: 1A / 3A / 3A / 5A / 7.5A / 10A / 15A / 20A / 25A / 30A / 35A / 40A.
Attention: Please choose the fuse according to the fuse melting time.
Remark: The Protector is not included the fuse. "