Sena Prism battery charger alternative

[mermoto]

Anyone found a cheaper battery charger for the Prism batteries? I have a multi adapter but none of them fit Senas battery and their charger is a bit ott. All I want to do is charge the batteries when out on my bike from either bike power or from my charge bank device.

 

[Blackal]

Plug that into a Hella plug/USB supply on the bike? Seams fairly neat?


https://www.amazon.com/Motorcycle-Hella-Socket-Charger-SatNav/dp/B00AU0OA9C


Al