Yeah it has protection circuit to protect overcharging. Lithium based batteries can always take charge, and might self-combust. (ok , worst case. basically, lithium can't get in contact with water. RH in air is just enough to start the self combustion reaction). Nowadays, Li-ion or Li-Po are well made, and this is less problematic.
This as been said, it doesn't mean that this circuit won't trigger the battery every 0.XXX% drop, which is not good, so yeah, until someone do electric reading test on the op5, I won't suggest to let the device plugged in when full.
Simple rules for lithuim based batteries :
-
time will kill the battery, even if it's brand new sealed. (normal chemical reaction). Nothing we can do here, limit extreme temperatures, not too cold not too hot.
-
heat will decrease battery life and capacity. This mean, dash charging will decrease life. So, 1.2A to 2.0
[email protected] charger is more appropriate. Even if dash tech will regulate the charge, you still have a time that it will optimize to max power, so more heat.
-
Polarity direction changes will decrease life/capacity. This mean, do not charge it if you don't need to.
- do not wait to
drain it at 0%, I don't know what is the security factor from OnePLus. A single lithium based batterie under 2.60-2.75V, will mostlikely be dead , or will loose more than 50% of his capacity.
Some lithium based battery will perform better, but to keep low price, do not worry, oneplus use standard li-po.
More developed info here :
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries