Battery life is definitely worse on JB via Vodafone UK, unbranded handset.
6% android system
6% voice calls
3% cell standby
3% device idle
currently at 78% on 5hr 13m 1s
this should no way be this low in such a short period of time imho.
Come voice your opinion on the Orange preloaded software on Branded Handsets - http://bit.ly/bK8wpS