Charging Your Car Battery
Step 1 - Disconnect
If possible, remove the battery leads. If not, disconnect the negative (-) cable, first checking that you have your car stereo security codes plus those for any other in-car equipment affected by power loss.
Step 2 - Attach Charger
Consult the battery charger's instructions to ensure that it is suitable for your car's battery and is set correctly. Fit the battery charger's red clip to the battery's positive (+) terminal and the black clip to the negative (-) terminal.
Step 3 - Switch on Charger
Connect the battery charger to the mains and switch on. A green light or other tell-tale signal should show. If nothing happens, switch off the battery charger at the mains and check that the leads are correctly attached to the battery.
Step 4 - Disconnect
Once charging is complete, (depending on the model) a second light will show. Disconnect the battery charger from the mains and remove the cables, starting with the black lead. Reinstall and/or reconnect the battery.