I see this question is 2 years old but I just ran across it. The wall charger is Model: WJ-Y350900300D, Input: 120V AC 60Hz, Output: 9V DC 300mA. The car charger Input: 12V DC Max. current 2Amp. They are available all over the internet. Also this may be the real answer to your question.... the chargers are in the bottom of the lantern. Just unscrew the bottom and they are inside with the battery.
Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them