I have seen this question quite often so I decide to write an article here about how to improve battery life and best practices. Republic does have some great resources for battery life improvement. Extend Battery Life – Republic Help
Also, the blog from @theproductguy: https://pwk.republicwireless.com/get-more-battery-life-outta-your-phone/
For those looking for a best practices. Here are a few that I can suggest for ultra battery life span. What I mean here is number of charging cycles. For those that plan on upgrading their phones after about two years, normal use is typically fine. I do recommend everyone follow tip number one though.
Do not leave your phone charging in your car. This is especially true in the summer and winter months. Extreme temperatures while charging is never good for the battery and will likely kill it way before its time.
Take the phone off the charger before it hits 100%.
You should charge the phone when it hits 15-20% and not let the phone completely die. Depth of discharge on a battery can negatively impact battery life.
Using a lower powered charger. While a lot of new phones comes with quick charge capabilities. this can have a negative impact on how long (charging cycles) the lithium ion battery can have. A non quick charge charger will take longer to charge the battery, but can extend the battery life span.
Do not use your phone will charging. Use of the phone while charging can prolong charging and cause extra heat.
I used this link as a reference while researching this topic: http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
With the above tips, number one is essential. Tips following number one, those are for those trying to get more than the average year and a half to two year lifespan out of their phones.