This is a link on the charger. It may take longer than the Pila because it has an algorithm that when the battery is very low it charges at lower MA. But the advantage is that the way it does it is low enough to reset a overcharged battery.
Link to a review: The review is older so there is a possibility that the charger has changed as you can see by the change in labeling on the Charging Voltage
Review of / Measurement on Xtar WP2 II charger
Salient part is
Below 2 volt the charger charges with about 0.5 mA, this is enough to reset a protection pcb (Note: The led is green).
Between 2 volt and 3 volt the charger charges with about 80 mA.
Between 3 and 4.15 volt the charger is applying regular charge current (See curve below).
When the charge stops the current is between 60 and 75 mA in my test, when the charger is finishes the current goes down below 100uA (This is a insignificant current).
The charger will restart charging when the cell drops to 4.0 volt or after a power loss.
When charger is disconnected from power, but with a battery in, it will draw about 550 uA from the battery.
Two batteries will not change the charge current.
Because each channel is independent, the different voltages vary between the channels with a small amount.