![Schumacher SC1281 Battery Charger, Engine Starter, Boost Maintainer and Auto Desulfator with Advanced Diagnostic Testing- 100 Amp/30 Amp, 6V/12V : Amazon.co.uk: Automotive Schumacher SC1281 Battery Charger, Engine Starter, Boost Maintainer and Auto Desulfator with Advanced Diagnostic Testing- 100 Amp/30 Amp, 6V/12V : Amazon.co.uk: Automotive](https://m.media-amazon.com/images/I/61kTgizc9YL._AC_SY355_.jpg)
Schumacher SC1281 Battery Charger, Engine Starter, Boost Maintainer and Auto Desulfator with Advanced Diagnostic Testing- 100 Amp/30 Amp, 6V/12V : Amazon.co.uk: Automotive
![Schumacher SC1362 Fully Automatic Battery Charger with Engine Starter Boost, Maintainer - with Advanced Diagnostic Testing - 85 Amp/30 Amp, 6V/12V - For Cars, Trucks, SUVs, Marine, RV Batteries : Amazon.co.uk: Automotive Schumacher SC1362 Fully Automatic Battery Charger with Engine Starter Boost, Maintainer - with Advanced Diagnostic Testing - 85 Amp/30 Amp, 6V/12V - For Cars, Trucks, SUVs, Marine, RV Batteries : Amazon.co.uk: Automotive](https://m.media-amazon.com/images/I/51OCr++zrXS._AC_SY355_.jpg)
Schumacher SC1362 Fully Automatic Battery Charger with Engine Starter Boost, Maintainer - with Advanced Diagnostic Testing - 85 Amp/30 Amp, 6V/12V - For Cars, Trucks, SUVs, Marine, RV Batteries : Amazon.co.uk: Automotive
![Old style Schumacher 12v battery charger went nuts after connecting (for a while) in reverse. Need help to know where to start. Now it just hums for a few seconds, then shutdowns. Old style Schumacher 12v battery charger went nuts after connecting (for a while) in reverse. Need help to know where to start. Now it just hums for a few seconds, then shutdowns.](https://preview.redd.it/3ysgksmo6le61.jpg?auto=webp&s=e57dfb74b24029e125bf478fe0da2c69d0d83f3c)