Lead-acid batteries emit highly explosive hydrogen gas during the charging process. Always practice strict safety measures to mitigate risk.
Connect the cable to the positive (+) terminal of the battery first.
Battery acid is highly corrosive. If acid touches your skin or eyes, rinse immediately with clean water and seek medical attention.
When the needle settles at or near the lowest mark (0A to 1A) and stops moving for an hour, the battery is fully charged. 4. Step-by-Step Operating Instructions