On the other hand, if you are a 'cheapie chappie', there are no end of iMax B6 clones on ebay. Lots of features and they cost about £12 – 15 there. I've used one for years, found it works well, and haven't blown anything up.
Yet.
(Note: Claimed lack of explosive tendency only refers to battery charging actions conducted with the iMax. It does not cover any other electrical or chemical activity.)