Optimal Cellular Li-Ion Charging/Maintenance Strategy

[Simon Durkee]

I recently purchased a Samsung Galaxy Note 9. To minimize the amount of wear on the battery I've configured a system where the charger will turn on at a certain level and turn back off again at a certain level.

My question is, what is the optimal level to start charging the battery and the optimum level to stop charging the battery? Currently I turn on the charger at 65% and turn off the charger at 66%. So the phone hovers between 65 and 66% continuously throughout the day while it's plugged into the charger.

Any insight you can provide on this would be greatly appreciated. Thank you.

 

[itsmoked]

I only unplug my Samsung laptop from the charger when I go to the field, otherwise it's 100% ALL the time. Original battery in a 2009 gamer 4 core 2-drive behemoth. I can detect no noticeable reduction in battery run-time.

My S6 I leave on the cordless charger most of the time I'm not out of the office so it mostly gets 100%'ed. Same story, I don't detect any reduction in run time. I've also run it down to single digit remaining occasionally.

Life's too short, keep it fully charged and don't think about it again. I don't think any particular charge regime you come up with will be worth the hassle or make a difference over some other variable you may not even be aware of.

Keith Cress
kcress -

http://www.flaminsystems.com

 

[racookpe1978]

You're cycling the charger continuously to try to avoid battery life issues, but the hysterisis of the cycle period needs to be much, much larger. Now, you have a near-inifinte (1%) theoretical recharge start-stop cycle.

I do not know the precise optimum cycle points, but they should be much closer to 50% level begin charge, stop charge at 95% .

 

[racookpe1978]

For a much more thorough explanation, see

https://batteryuniversity.com/learn/article/charging_lithium_ion_batteries