I want to buy a new pair of 18650 and I found Panasonic’s NCR18650B. Is it enough?
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Those are fantastic cells as long as you are careful with them. I have Sanyo NCRs, which are comparable to the Panys. The only cells that are better are the LGs and the Sony Muertas. The NCR chemistry means it will hold its charge longer, stand up to more charge/discharge cycles and not die so quickly under regular use.
My Sanyo NCRs arrived the other day, and I also picked up one of those XTAR chargers I believe you (or maybe someone else?) had recommended in a forum thread. Plopped them in just to test and see the readout on the display. I was tempted to charge them, but I guess it’s probably best to leave them alone – sounded like it’s a bad idea to store them fully charged? (Sounds like it affects battery life.)
But I’m glad I’m all set for the DevTerm, when it arrives one day. Here’s hoping the batteries last that long. (Just kidding, mostly.) 
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Charge them up once to 100% (~90% after is pretty safe if you wanna extend lifespan)
Then use the charger and cells to charge your phone or something so you can discharge them to 90% or whatever you want. I think it is pretty safe to leave the cells in the XTAR as long as it isn’t plugged in and charging (like a storage box)(also, don’t quote me on that, could be risky) but I normally practice using dedicated storage mediums in lieu, and to only really use the xtar for charging (the cells or other devices)
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I forgot one thing. Can DevTerm charge the 18650 battery?
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The cpi 3.14 main board has a PMU:
- PMU chip which supports reliable and complete lithium battery charge and discharge management.
How good is it?
I wouldn’t let it charge your cells unattended.
Even trickle charging to @100% isn’t good
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No, NO NO and no.
Please stop with that BS.
The chip used by CPi is the same used in a lot of smartphone and other devices. This is not some randomly made charger.
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and lots of folks still shorten the lifespan of their internal cells by leaving them on the charger for 8 hours when it only takes one to get to 100%
Which is why im such a fan of Qi. That might be a sweet mod maybe…
Found my cells put some charge on them… not wanting to over charge… have a better charger coming. Also on the way is a couple of 4 cell battery housing that will generate 16.6 volts nominally - I currently use old lap top batteries for powering camping LED lights. (but these slowly die) Now that i have these great 9900 maH x 10e-1 batteries that came with a flashlight I will build my own 16.6 volt cells. I use a buck boost converter to get down to a nominal voltage of 11.9 volts so that the LED’s produce light but use very little current. … I got to do something till the DevTerm gets here…