Zte Z836BL User Manual page 172

time
WAP browser
version
HAC
Bluetooth
NOTE:
The phone's talk time and idle time are based on ideal working
environments. The use of extended backlighting, browser, and
network conditions can reduce battery life and talk/idle time.
25.3 hours (2G)
22.1 hours (3G)
2.0
M4/T3
4.2
172