Since last update, the battery life has been terrible.
I charged the watch to 97% this morning (I rarely go to 100% in an effort to reduce lifetime stress on the battery) and within 25 mins it was at 87%. This is typical behaviour in the last few days having previously been around a 25% points drop over 24 hours. I've gone to look at the watch and been surprised to find it in single figures or off on several occasions having suffered from unexpected rapid depletion in the last few days.
I do concede that performance will degrade over time but I am highly suspicious of a sudden degredation following an update.
We can discuss dendritic formation from ion nucleation and other failure modes of lithium type batteries in another discussion thread - what I'd like to discuss here is whether this is a common issue and if there's a reasonable workaround. That said, if this is likely a battery issue, please shut me up and educate me. Happy to be shot down in flames here. :-)