It is LiFePo4 battery can be discharge for full capacity in 15 minutes or even faster ?, how can I know whats maximum speed my battery can be fully or almost full discharged ?, I have 650va UPS and its have only 12v 7ah battery (SLA Deep Cycle)... Can I also use 100ah LiFePo4 battery for full discharge with lets say 400a load or more ? (Like in UPS, they just fully discharged in about 5-10 minutes)