Talk:Valkyr (Warframe)/@comment-84.90.45.7-20151006151306/@comment-8256051-20151008042351

Duration mods now affect the duration of what is "one second of drain".

If you have 200% duration, "one second of drain" will actually be stretched on 2 seconds (like 150% efficiency would do).

If you have 50% duration, "one second of drain" would be spend twice every second (like 0% efficiency would do).

All of this cannot excess the usual total maximum of 25% cost reduction (thus even with maximum duration and efficiency, you can't go below 25% original cost per actual second).