Overall it’s a great back for the price but I do have one concern with it. The solder doesn’t seem to melt very well or actually imbed itself within the wire strands. No this could be a fault on my own with the lack of a hot enough heat source. But I do believe this could also be remedied with some flux being placed on the wires before using the connectors. I only have 4 stars on the waterproof factor at the moment because I’ve only been using them for about a week but will update in another month or so on how they hold up.