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The Trustfire TR-001 charger is a mid range charger for Li-Ion batteries. It will take 18650,18500,17670,16340,14500,10440 and 16430 batteries. But basically it will charge any cylindrical Li-Ion 4.2 battery that will fit in it, you may need spacers (not supplied)
It has two independent charging channels for Li-Ion batteries with a separate LED for status for each channel. Red = Charging, Green = Charged.
Comes with 3 foot power cord.
I have used it for the past three days and charged just about every battery I could find, without any problems. The charging current is quoted at 500ma. When the charger is in the initial phase of charging a run down battery, it will be supplying the most current. The casing was just a few degrees warmer than room temperature throughout this phase and gradually got nearer to room temperature as the battery approached full charge. The springed contact post moves easily along the slot. You can charge different size batteries at the same time.It comes with a mains lead and a useful see through carrying bag.
Personally I use a 4 channel Nitecore charger which I suspect is a little quicker than the Trustfire, this would make a good “ONLY” charger and an excellent back up charger.
It can also be powered from a 12 volt supply, so very handy for the car on a trip via the now defunk cigarette lighter.
There is nothing too exciting about it, but then that is just what you want from a battery charger
I think with these, if they work they work OK - I've had one since I first started and it still works, though I rarely use it these days. I think many of the problems (if they don't whine!) with these are caused by naff power leads.
Had mine about 7 months now with no real problems.
That said, some of my batteries have been dented because my charger springs are a little too firm and I too get a noise when the batteries are fully charged. Not a problen though, everything still works just as it should.
Although one of them does have a little "whine/buzzing" on start up which is slightly concerning when it happens, usually disappears after a minute or so.
Agree with previous poster, poor charging leads.
The two pin plug does not fit snugly into a shaver adapter at all well.
They should all be forced to fit 13a plugs, of the two other variations, I prefer the flat pin ones, they are not as safe as the round pin ones though because the insulation is better on the round two pin ones, but they fit really well in the adapters I have.