The radio's keypad is mostly covered-up when the radio is dropped into the charger base. Basically, the charger base is to be used overnight to recharge the radio when it's not being used.
When inserted correctly and charging, the base LED is red. When fully recharged, the base LED is green.
The AC adapter for the charger base is included. It's not approved by anyone (not UL, not CSA, not CE) - nothing. The AC adapter (the one I received) is clearly marked "INPUT: 110V" (with a decal). It's an old school transformer design (not switching power supply) judging by the weight.
The battery seems to be pretty good so far. It's a lithium ion (Li-ion) battery and is supposedly rated for "2000mAh" (2 amp hours). Replacements are apparently available on the Internet.