There’s nothing that can be done from the software side Unless a specific device can be configured to report less often. As @awestun mentioned, One critical factor is simply how often the device Has to report. Motion sensors in high traffic areas will use up their batteries much more quickly than ones in quiet areas.
The second issue is how hard does the device have to work to get its message to the hub. So how many mains powered devices do you have and where are they located relative to the sensors?
Normally Zigbee devices have better power management than zwave, But Zigbee repeats only for Zigbee and zwave repeats only for zwave, so if you don’t have enough Zigbee repeaters, your zigbee devices might have to send the same message two or three times to get it through, which then uses up batteries two or three times as quickly.
ReAd post 11 in the following thread, then go up to the top of that thread and read the whole thing. It will explain the details of this issue. (The topic title is a clickable link.)
If you do need to add Zigbee repeaters, the IKEA Tradfri pocketsockets are less than $10 when bought directly from IKEA and work very well for this purpose. 