Instruct: Classify the given Amazon review as either positive or negative.
Query: Battery charger for the geek

I bought this a wile back. Although the user interface is not perfect, the battery charger is hands down the best on the market. If you are into battery charging, then this is the unit for you. It gives you several options for charging current and allows you to set it by battery. It also has discharge options and allows you to fully see what your battery is doing. I also think they do a better job when it comes to automatically stopping charging. I don't think they are cooking any batteries. Add to that the 4D cell inserts and 4C cell inserts and 4 AAA and 4AA batteries and you have a winner.The only other thing to note is that an AA batter is just slightly longer then a C cell. I used six C cell inserts, which simply hold the AA batteries in place and had to struggle to get them into the radio. It's okay for battery compartments that need only one or two C cells.