OK, before anyone gets unduly worried by what you have said, I need to point out that I have not heard ANY reports of the trustfire chargers posing any problem of any kind with proper use and when charging standard protected batteries.
We've just got to be careful with all these batteries, they are all potential miniature explosives if not used properly.
Spend £5 on a multimeter, check your batteries regularly before and after use and charging. Always check the batteries for damage and always observe correct polarity. Dont leave unattended whilst on charge.
As a matter of fact, I think in some cases, relying on the stated protection can actually get us into more trouble.
I was not trying to getting anyone "unduly worried". I don't expect anyone to bother spending as much time as I do, researching subjects, but can say there are reports, photos, etc. of these exact chargers doing what I posted, that they can potentially do these things, and that is FAIL. I can't substantiate these reports since they are simply users on the internet. So far I have not seen any reports of the Pila charger shorting out, over charging, or starting fires, and AGAIN that is NOT to say this charger is in fact any safer in real life usage. Folks will have to make their own purchases based on how far they want to research a product, but an INFORMED decision would be of best interest. I work in an industry that uses a lot of battery devices, on the very high end, so the devices and chargers are all matched to each other, and the makers have smart designers and technicians that all do not want to be sued.
For my own personal use, the video and photo devices on the "prosumer" end, all come with their own brand chargers and batteries, so I've never assumed a problem could exist, and have never had a problem or read about one.
BUT, when we get into the fairly new world of charging these kinds of batteries at home, with less then $20.00 chinese battery chargers, the playing field has changed. I never had or used rechargeable Li-Ion batteries of this size or voltage, never had a reason to, for SureFire flashlights, I had access to the disposable 3.0 volt Li-Ion batteries. Now I see a larger market has developed for rechargeable batteries in this style, and wanted to take this opportunity to LEARN about these new batteries and chargers, since I myself will have to start using them for my upcoming GGTS. The biggest point I have learned as of this writing, is the Li-Ion charger market is very slim on choices and SAFETY.
Using a meter is smart if users take the time. BUT, unless you really know how to use a volt meter, it may be best to read all the posts on the "battery forums", as these folks have expensive "Fluke style meters", and can tell you what readings are useful as well as those that are false assumptions. If anyone thinks they know more then folks that do batteries for a hobby do, think again. For example using TWO batteries in a device seems to increase the potential for problems as well, whether protected or not. In some cases, like a "protected battery", the built-in protection may shut off one battery, when the voltage gets too low, leading to the 2nd one shutting down as well.
If you prefer I will not post these types of messages? Just figured "knowledge is power", whether you are a seller or user.