Battery life?

Just polling people to see what sort of battery life you're getting with your Vector 3 pedals.

So far, using very cheap batteries, I've got 62 hours & then 57 hours use from the last two sets.

These times come from time spent riding then rounding up each ride to nearest 0.1 hr ( 6 mins) to allow for cal time at start,

and guessing how long they take to sleep after use.

The cheap batteries are costing me about £0.32 per set, so very cheap.

Considering giving Duracell power+ a go; has anyone used these & got good battery life?