This is good reading material if you want the knowledge. CH has spent serious time and energy doing the hard work for us.
Just note that Hobby King is less expensive than most places, but they are in China. Sometimes you get the 'real' product because it was outsorced and you need to deal with the moral/ethical issue of that yourself. Other times you get the lower quality patent ignoring copy.
The Accucel 6, last selling for under $30, is a high quality charger that people who live for batteries, the RC folks, often have in their gear. There are copies being made and I don't know how you get the one with the quality components inside or get one with the components are not as solid. Somedays they are in stock and in an hour or so they are out of stock.
Anything from there comes from China and the last time I bought something from a China warehouse, it was $11.00 for shipping. Transit time is usually about a week but can be seriously longer. Saw on a RC forum that there is a flat rate shipping charge of $3.00 now. Don't know the accuracy of that. The bottom line for me is after you buy it, it's yours. Warranty, service, returns are a good deal harder when you are speaking with a person who is a native Chineese speaker and is trying very hard to communicate with you in English. For those of you who do not do the English thing I would find it really interesting if they have sales folks trained to speak both English and say, Spanish. If you look at the top of the home page, it will tell you what time it is in China so if you call, you aren't calling in the middle of their night and nobody is at work. jim