Consider the 4sevens charger, version 3, I believe. I've been using it since its release with zero issues, 14500's, 16340's and 18650's all come off at 4.16v and settle at 4.15v. Never gets warm, two charge rates and good construction. I own less than ten li-ion cells so the single bay doesn't hamper me at all. Backed by 4sevens c/s if you have an issue.
I'm looking to expand and may just buy another, but I am intrigued by some of the newcomers. I wonder if you may see a price drop on the Pila if enough cc/cv chargers prove worthy?
Why not just make up a couple of chargers with the cheap charger boards ... You can get four boards for about £5 including postage ... These are genuine CC/CV charger boards ... Solder a couple of leads on and put croc clips on the other end of the leads ... Clip the croc clips onto 6mm or 8mm diameter X 8mm long magnets ... Apply the magnets (correctly) with the leads clipped on , to the Li Ion 18650 battery making sure the polarity is correct ... You will need a USB male to mini-USB male lead , mine are very short ones about 12" ... Plug the USB lead into the USB power supply unit and the other mini-USB end of the cable into the charger board ... Switch on the USB PSU , and that's it ... There are only two soldered joints to make ... This is for 18650's only as it charges at one amp , assuming that the PSU will provide one amp ... Wait till the LED changes colour and it's done.
Some boards (like my 4) are Blue for charging and Red for charge complete , others are the other way round ... I am very pleased with my four cheap chargers and they work superbly and are so easy to make (and store) ... I started off using one amp USB PSU's that plug into the mains sockets and they worked perfectly ... Had to use one for each charger board.
I have now made a five volt four amp PSU fitted with four USB sockets , though I only usually charge two batteries at a time ... I was very sceptical about how these (dirt-cheap) charger boards would work , but am delighted with them ... When the LED's change colour , the charging current virtually stops (just a few milliamps) ... If you leave the battery on charge for a while after the LED's change colour , the battery voltage drops a few millivolts proving that the charging current has virtually stopped.
If you want to charge at a lower current than one amp for other batteries , then you will have to change a resistor ... I have not bothered with this as I only use these for Li-Ions of over 2400mAh and even these batteries are being replaced by Panasonic 3100mAh cells ... So no problem.
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