Wear OS - view battery usage when watch off

[spark001uk]

As title really. So here's the scenario - watch unexpectedly dies, you want to see what caused it, or at least view the battery graph, but you can't see it in wear os app because it won't show you, until you put it on charge and boot it up, but then the stats are wiped. Is there any way of viewing the last recorded chart after the watch dies? Another app perhaps?