The Turbo 4 is a "trickle" or "standard" charger, not a fast charger.
Locate the Positive (+) terminal (usually red or larger) and the Negative (–) terminal (usually black or smaller). selmarturbo4batterychargerinstructions link
Lead-acid batteries release explosive hydrogen gas during charging. Always charge in a well-ventilated area. The Turbo 4 is a "trickle" or "standard"
Turn off the power at the wall outlet and unplug the charger. Remove the clamp first. Remove the Red (Positive) clamp second. Replace any battery cell caps you may have removed. Troubleshooting Common Issues Always charge in a well-ventilated area
Attach the black negative clip to the negative (–) terminal.
The Selmar Turbo 4 usually features an analog needle (ammeter) on the front panel.
When you first turn it on, the needle will likely jump to a higher number (e.g., 3 or 4 Amps). This indicates the battery is drawing a high current because it is flat.