i'm not gonna say that it is bad...but i will say that it is not recommended. LR atties are only recommended for
batteries rated 450mah or higher. Some will also tell you not to use LR atties on any kind of stock battery, even an ego rated at 650mah+. I'm far from a battery expert, but i believe it has to do with the MOSFET not being equipped to handle the current being drawn. I'm sure someone with more knowledge of this can help. That being said, countless people use LRs with egos/rivas without encountering any trouble.