I am doubly happy, I bought 2! 
I’m very happy with mine too. The number of features is impressive and it has been very useful in helping me go through my battery collection and determine which cells are no longer fit for duty.
We are very glad that you like this dream charger, thanks for your support! More discounted deals from Gearbest’s Special Deals, hope you like it! :8)
PS: Thanks most to Tatasal, we really appreciate for this wonderful chance to work with him, he is very responsible and
integrity! 
Hi
does this code work with Opus BT-C3100 V2.1 too?
I think I’m too late
If you try it and it does not work then all you need to do is PM and ask to re-activate the code. The worst they can say is "no" but the philosophy is usually sell, sell, sell.
Heres the link for the new GB.
greate
thanks
Anywhere i can download the manual for the C3100/C3400?
thank you, link worked.
How about a new coupon code from Gearbest for the Opus C3100 4.2 version.
+1
Is the 7.4 version out next month?
i think the most current version is the v2.3 firmware
Today, my BT C3100 V2 slot #3 is malfunctioning - reading higher cell voltage than actual - remove cell from slot, lcd still reads last value displayed - will not clear until power plug is removed.
Tested cells in my Xtar VP2 to verify misreading of BTC3100 V2.0
Anyone else have this anomaly happen with your charger?
My unit died this week.
What is the best replacement.
How’d it die?
I was charging my Eneloops and I came back and it won’t power on now. Maybe the Power Supply died but this was v1
My Vapcell S4, Miboxer C4-12, and Eizfan Lux S4 has the same 12v power supply output voltage and barrel connector, and in fact, to most other brands of chargers.
Nice, I’ll check if I have another power supply but I don’t have a 2nd unit or alternate chargers like your collection.
I qas thinking of getting a charger that can also do RCR123A for Arlo cameras, and read that the BT-C3100 v2.2 can do it.