Hi,
I have read that the normal Li-ion cells can be put out with water, just not the special type which i'd have to look up to remember (later: lithium metal cells). Good to know what kind you have. Most of the common kind are not lithium metal, and the common kind have less li metal.
Just to note, when the voltage set point is set to 4.200 volts, the current might start to drop off at 4.100v, or maybe 4.150v, or even 4.160v, depending on how much internal resistance the cell has. This is because the charger acts like a voltage regulator which (can) regulates the output to 4.200v, but with 0.05 Ohm internal resistance we cant put out the full 1 amp anymore:
(4.200v-4.150v)/0.05=1 amp, but
(4.200v-4.175v)/0.05=0.5 amps which is cut back to 1/2 full current.
So you see how this works, as the voltage creeps up near 4.200v the curent starts to cut back, and as the voltage creeps up more and more the current cuts back more and more, until the "cutoff current" which is maybe 50ma. At that point the cell is considered charged.
There is one more view point though, and that is that if you dont mind charging to only (say) 4.15v instead of 4.20v, once the cell reaches 4.15v with the charger set to 4.20v it may be considered charged to some because they want to get more cycle life out of their cell. But here the charger is still set to 4.20v, and the charge is terminated at 4.15v using the same meter to measure both voltages (for accuracy)