There have been many complaints about Google Nexus 5 battery life from device owners, even after the recent Android 4.4.3 update.

Battery drain issues was one of the reasons Nexus 5 owners had anticipated the KitKat upgrade, which came with the promise to fix battery drain, bugs and other problems.

However, it appears more issues appeared after the Android 4.4.3 update, and Nexus 4 and 5 got the biggest share of problems, such as lagging apps, connections and screen freezes.

Other issues include notification problems, lagging Google Play Store, redesign lag in the Android dialer and unknown errors in Exchange ActiveSync.

The first Android KitKat buzz came in March, and the update was said to be a massive or major bug fixer that would tackle problems brought on by Android 4.4.2, which were quite many.

Early June, Google pushed out Android 4.4.3 to stabilize Google Nexus 4, 5, 7 and 10, plus update the OS of Google Play phones: Moto E, Moto G and Moto X.

It did squash many Android 4.4.2 bugs, while at the same time bringing along some cosmetic changes. However, Android 4.4.3 also brought new bugs of its own.

One of the quickest solutions to handle the issues is to do a factory reset by going to Settings -> Backup & Reset -> Factory data reset. Needless to say, this will delete most of your data, along with your text messages and photos etc.

Last week held quite the surprise, when Google had Android 4.4.3 quickly followed up by an Android 4.4.4 update.

While minimal, the upgrade brought a completely new OS version for Google Nexus 4, 5, 7 and 10.

It includes a security fix, which is also HeartBleed-associated - an issue which has been plaguing most OpenSSL platforms.

With regard to battery drain, Nexus 5 has always shown impressive battery life, and is supposedly not affected by the updates, just as many owners say.

For those who want to manage their battery in detail, they can go to Settings -> Device -> Battery. Battery life can also be saved by turning off unneeded features and adjust settings such as screen brightness.