Well the device is using a Lithium-Ion battery so there are some general rules to extend the life of a battery.
1. The chemistry make-up of the battery prefers a partial discharge as oppose to a full discharge (0%)
That is pretty much self explanatory. Don't wait for the battery to go dead to recharge rather charge when you can. The recommended charge level is about 40%. You can charge as many times or often as you want as they don't suffer from 'memory'. The term 'memory' is best explained by an example:
Let's say you had a battery that is 50% discharged. If you were to charge it at that point, the battery will think it was fully discharged and will
remember that point as being as such. So, when you start using the fully charged battery again (100%) and the battery reaches the 50% mark, the battery thinks its fully discharged when it's obviously not. In effect, the storage capacity was halved. That's why you see back in the day to totally discharge the battery before recharging.
Lithium-Ion battery does NOT suffer from this.
2. Lithium-Ion batteries age and have a life of about 2 - 3 years
I'm sure everyone knows this fact if they own cell phones or laptops. Over time you notice that you have to charge more often because the battery loses its power faster. Thats just the way it is. Advice here is to avoid 'not using it' thinking that it will prolong the life of the battery because the battery still ages even when not in use.
3. Avoid storing the battery in a heated area
The speed in which the battery ages is manipulated by temperature. Whenever possible avoid leaving the device in your car especially in the summer as the heat can drastically reduce the age and storage capacity of the battery. It's good practice to do this anyway as the car might become a potential treasure chest for a thief.
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