Battery life on Sire Z3 basses

[mcnach]

Just wondering what's people's experience with the battery life on the Z3 basses.

I installed new batteries soon after I bought mine, in August last year, and I've just had to replace them (started to distort and make noise which fresh batteries cured), so about 6 months with moderate use. For comparison, every other bass I've had would last at least a year with similar usage (I replace batteries once a year to be safe, which works well for a Stingray).

Has anybody noticed a shorter life on the Z3 compared to others? Just wondering whether my batteries weren't great, or if I need to schedule my battery replacements a bit more frequently on the Z3 (maybe replace every 4 months).