Chloe,
the spike was recorded at 4.20V. Charger resets were observed at 4.35V.
The price is not good yet.
http://www.aliexpress.com/wholesale?SearchText=bt-c3100&catId=&initiative_id=SB_20140321233102
There is a group buy on German forum TLF, cost ~40€:
Is that a group buy for the corrected version of the charger?
A google search came up with another technical review of the early BT-C3100, says "Preview":
http://www.mountainprophet.de/2014/03/15/preview-akkulader-opus-bt-c3100/
Yes, if you click the Google docs link in the TLF post it says new firmware including error correction. The voltage switch remains internal.
€ 43.85 = $60.49 So their group buy price of 40 units is the same as a single Aliexpress unit shipped to usa. I wonder what we could get the price down to? Maybe just waiting a month or two will lower the price of them a lot.
- Joe
Ouch $60 with only 2x26650, no 32650, max of 2A with spikes too, so $120 to charge big multi cell lights at once?? Bye bye to the “dreamcharger”, its turning into a nightmare. 
I’m not sure I’d call it a nightmare. I paid about $35 for a Lacrosse BC700 that only does AA and AAA that I love. This is the same thing, but it will also do my 18650 and 14500 cells. It would save me from buying a hobby charger, and then rigging it to do discharges and other things. I wish it was more like $40-$50 but I will end up with one eventually. I will wait a bit though and see how the price changes. I think our uses for it are different. I have nothing larger than an 18650. I want it for discharging and doing capacity testing of 18650s and such. Things that you’d normally need to buy a hobby charger for, and then hack it so it does single cells.
- Joe
Yeah I’m responding to the drama with which we were promoted this “dreamcharger” for months to wait to purchase 
Its not horrible, but for the price I wouldn’t get it, and for my use, the use that this was promoted to solve for me, its poor. For a multi chemistry person I guess its OK. *as long as you are only charging 18650/smaller cells. But that’s not what I want it for, I have other chargers for that. This was promoted as a solution for the big multi cell lights, which it is most certainly not. 2x TR-008 is a much better option for price at $30 each, but then they have a charge dip during charging and HKJ noted some over-voltage at times…keep on dreaming for a dreamcharger I guess.
Banggood have “Powerfocus” branded ‘BC3100’ (58.69 USD).:
Also listed, C/D cell adaptors, like in the BT-C2000 :
Well, that didnt take TOO long to finally go on sale :D!
And those C/D adapters are chepaest ones Ive seen!
They say, the best things come to those who wait…
What does that mean? Its $62.99 on that site?
Is the spike still an issue? I'm not clear on all this. Looks like a great charger other than that issue.
That Powerfocus is too expensive unless it's revised and working properly.
so anyone already arrange a group buy for this charger?
i cannot reach the bogus website powerfocus.net 
This URL has much commercial material about the product?
What does it say, it it the revised version of Chloe's product? :)
Hopefully it’s the fixed one. There is a fixed firmware according to post #127. Google Translate gives me a headache though.
- Joe
I thinks the group buy fir this charger just started: