Reputable sites like ManualsLib, ManualsOnline, or BatteryChargerDoc.com sometimes archive older or obscure charger manuals. Always scan downloaded files for viruses and verify that the model number matches your unit (look for a sticker on the back or bottom of the charger).
The is a classic automotive tool designed for charging 12V lead-acid batteries with a 4A max output.
Congratulations on purchasing the Selmarturbo 4-Battery Charger! This charger is designed to charge up to four batteries simultaneously, making it an ideal solution for users who need to charge multiple batteries at once. In this manual, we will guide you through the safe and proper use of your Selmarturbo 4-Battery Charger.
The "Turbo" setting is why people search for the instruction link. Used improperly, it will fry your battery.
Start on "Medium". Never start on "Boost" with a completely flat battery.