I just got a universal charger for my ebikes, onewheel, efoil, and also the SP140.
Compared to the charger that came with the battery, it offers quite a few benefits:
- smaller, more portable
- completely silent, no active cooling
- lower/customizable power draw so you can charge from car inverters and smaller power banks
- customizable target SOC (e.g. charge only to 85% which is more gentle on the battery if you’re not planning a long flight)
- built-in and custom profiles for different batteries
- one charger for many/all devices, with simple adapters
- faster than most ebike chargers
- works with 110/220V AC
Of course it is slower than the factory charger but for me it offers a great alternative. More details at Finally, the universal charger! – blog.ekus.net