User blog comment:B214/Question & Answers 5/@comment-63.136.113.196-20150525215018/@comment-97.103.233.248-20150528032714

I'm kinda confused on how long issei's and vali's boosted or divided power can last as well. On one occasion issei boosts his power and it goes away after one strike but there other occasions where it doesn't(issei's fight with vali and when issei did a combo move on shalba with boosted power) this also goes for vali when he fought kokabiel and divided his power for the entire fight.

I've had this confusion ever since issei attained BB because in the normal form of the boosted gear it announces "explosion" and "reset" to show when issei's is using his boosted power and when it resets. But in BB it doesn't have those announcements.