Would you go for huawei or lenovo for Wi-Fi digital devices for reliability and battery life?

Huawei

Read these 2014 and 2016 articles about USA government concerns about those Chinese companies: https://www.nytimes.com/....html?_r=0
http://freebeacon.com/national-security/military-warns-chinese-computer-gear-poses-cyber-spy-threat/
Don't believe it? Read what Lenovo says: http://www.zerohedge.com/news/2015-02-20/we-messed-badly-lenovo-admits-putting-tracking-software-your-pc

Either will do. Neither is any better / worse in general than the other. Possibly - all the devices are actually made in the same factory, then bought in by these companies and then sold with their logos on them!