Nokia 6120i Owner's Manual page 85

Please refer to the chart below for charging times in the
rear charging slot.
DCH-9 Rear Slot Charging Times
Battery Option
BPS-1 Ultra Slim
Li-Polymer Battery
600 mAh
BLS-2N Extended
Li-Ion 900 mAh
BMS-2/BMS-2S
Extended
NiMH 900 mAh
BMS-2V Vibrating
NiMH 900 mAh
BLS-4 Ultra
Extended
Li-Ion 1500 mAh
Note: Please note that if you are charging a battery in the rear
charging slot while another battery occupies the front slot,
please allow an additional two hours for a "maintenance"
charge for the battery in the front slot. Please see page 75 for
charging times for the front charging slot.
If you're charging a battery in the front charging slot,
charging is indicated by the scrolling battery bars on the
right side of your phone's display. When the scrolling
stops, the battery is approximately 80% charged.
A battery will be fully charged a couple of hours after the
scrolling stops.
Also, you may notice a light indicator on the stand,
which is used for charging a spare battery. A green light
indicates a battery is at least 80% full; the red light
indicates a battery is charging.
Using ACP-7U
When front When front
slot empty occupied
4 hrs
30 min
6 hrs
30 min
12 hrs
78
Using ACP-9U
When front
slot empty
6 hrs
3 hrs
30 min
8 hrs 4 hrs
30 min 10 min
15 hrs
8 hrs
40 min
When front
occupied
4 hrs
30 min
5 hrs
25 min
10 hrs
30 min