Hitachi TD61-2472 - Manual (Page 68)

Figure 5
1.21.Charging without the desktop charger
Step 1: Connect the AC adaptor to a wall socket.
Step 2: Remove the connector cover from the WIRELESSIP5000.
Step 3: Install the AC adaptor's 24-pin connector to the bottom of the WIRELESSIP5000.
Note: You can also charge with the optional USB cable instead of with the AC adaptor.
1.22.LED
LED color Status
Red Operating, Call underway
Blue Charging (Goes out when the charging is complete)
Table 1
Hitachi Cable 64