The charger can be adjusted to different batteries, they must have the charging contacts on the top or bottom narrow side and are trapped in the device with a spring mechanism.
The contact is made by means of two displaceable pins. Dabi must be the positive un know the terminals of the battery.
The charge level is via a brightly lit display with 4 loading levels.
The charging time is compared to the charge in the mobile phone (Galaxy S3, for example) rather long, the battery has been fully charged at the end of the process. He will not noticeably was there.
Due to the possibility to load different batteries, I hold the device very interesting.
Due to the lack of adapter I subtract points.
The Amazon service is not available here any help (otherwise already).