How's ur iPhone battery life on cellular data?

I am here in Singapore, using iPhone 5 on a carrier called "Singtel", and while the LTE here is not super fast (usually 15~20Mbps down, and 10 up), it is fast enough. The problem is, the battery life with cellular data on is just miserable. It barely lasts for 5 hours even on light-to-medium usage. Anandtech says LTE browsing is close to Apple's claim of 8 hours. (and their testing method is very close to a real-world scenario) Their iPhone 5 was on At&t... So fellow forum members living outside USA, how's your battery life on 3G/LTE? Are you able to turn cellular data on and use the phone( not heavily) for an entire day on a single charge?