You can feel the punch but i would not believe any manufacturer supplier unless they can supply you a test data sheet with your battery pack .
Email : email@example.com or firstname.lastname@example.org
Repair service Address
Hobbywing Technology Co., Ltd.
4th Floor, 3rd Building, KeLunTe Industrial Park, ShangLiLang, BuLan Road, LongGang District, ShenZhen, China