Regardless of whether there is sufficient electricity, always be careful to operate the battery, all lead-acid batteries contain high corrosive sulfuric acid and will produce explosive gas, batteries must be vigilant when charging.
-Charge the battery in a well-ventilated area
-Put the charger red positive wiring with the battery positive connection, black negative wiring with the battery cathode connection
-Ensure all connections are securely and securely
-Turn off the charger before connecting with the battery to avoid a dangerous spark (the same operation should be done after charging well).
-Do not try to recharge the damaged or frozen battery.
-Do not allow the battery to overheat or prolong the charge time.
-Read and understand the charger instructions carefully before using the device.