You can use a portable charger to charge your battery. You will have to turn off your jump starter and vehicle before you are able to charge the car battery. You will then need to connect the charger the same way that you would connect the jumper cables. Adjust the amperage and voltage on the charger. Set them low for the best results. You can use a higher amp to charge your battery more quickly.
You are now ready to let your battery charge. Your battery may only need a charge. However, you will eventually have to get a new battery. If the check engine light is always on, then it may be time for you to get a new one. You may also need a new battery if it is older than four-years-old. Additionally, a swollen battery case indicates you need a new battery.