Hi all! Excuse the simple nature of this question, but i'm a mechanical engineer working on building his own PAS bicycle and need to understand this to go ahead with my work. I understand that a 12V 7.2 Ah battery ideally discharges 7.2 ampere of current at a nominal voltage of 12V for 1 hour. But in reality, it is only capable of doing this for 45 minutes. So am I correct in assuming that as the battery is an SLA (sealed lead-acid), if the application demands 20A, it will deliver the current at nominal voltage for 16.2 minutes? I mean, is this relationship linear? Thanks in advance!