1.5 hand granades worth of LOW VOLTAGE ELECTRIC energy released into A CIRCUIT over A DAY or more and protected by multiple safety cut-off circuits with thermal

1.5 hand granades worth of LOW VOLTAGE ELECTRIC energy released into A CIRCUIT over A DAY or more and protected by multiple safety cut-off circuits with thermal and other sensors. vs A grenade releasing that as KINETIC energy into YOUR FACE over the span of LESS THAN A MILLISECOND and protected by a spring and a keychain ring. Even if a lithium battery of that size experienced a critical failure right in your lap, you'd get away with a few scars and some serious but treatable burns. And I've only heard of one commercial product in the last 15 years that had serial critical battery failures...