: For unsealed/maintenance-type batteries, unscrew the cell caps. Ensure the liquid covers the internal plates by 5-10mm. Top up using only distilled or de-ionised water if necessary. Skip this step if you have a modern sealed, maintenance-free battery. Step 2: Connect the Crocodile Clips
Note: If the battery is still in the car, connect the black clip to a heavy metal part of the engine block or chassis away from the battery and fuel lines. selmarturbo4batterychargerinstructions link
Disconnect the car's battery terminals from the vehicle, starting with the negative (-) black cable. This isolates the battery and protects your vehicle's sensitive alternator and ECU from potential electrical spikes. : For unsealed/maintenance-type batteries