NOT KNOWN DETAILS ABOUT SERAPHIM SOLAR PANEL

5 amp charger bulit in. I understand the charger can maintain the battery but can it recharge it soon after use? If I exploit 50% of the potential, and then the power will come on, can that two.5 amp charger recharge the battery or do I really need to use A different charger to deliver it back as much as full charge? Many thanks.Lead is harmful and