Capability is fine but also goes hand in hand with risk. Working on lipo/li-ion cells is risky which is usually why such work is not zoned for residential areas

Capability is fine but also goes hand in hand with risk. Working on lipo/li-ion cells is risky which is usually why such work is not zoned for residential areas. How would your skills and training translate into something a neighbor or inspector can understand? Would you resent them for questioning your non-dentist abilities? Is someone with no formal training but years of practical knowledge working on devices enough? It seems like the questions from my end bend back toward proving yourself when a situation breaks, not when it works, which is what sometimes happens when you do work yourself. Have you heard the parable of the nuclear boy scout, David Hahn?