Feel like buying this seeing many good reviews. Can I update it to V3.0 if I bought the V2.0?
It’s not user firmware upgradable.
659 units sold
WOAH. I didn’t expected so much units sold. I cant see a reason why you guys should close this GB?
Remember the complaints of some vendors to Opus? Three months is long enough for everyone to avail of this special consideration extended to us by Opus.
I understand, but what would Opus lose, or be negative for them if they leave the GB open for like 1 month more? they can only sell more units = profit, closing the GB wont benefit them or Gearbest in anyway.
You will never regret buying this.
The PS seems kind of minor once you start
testing batteries. There’s no reason not to love it.
It’s not perfect. It’s Chinese.
It’s not a stainless steel BMW brand charger.
It makes charging batteries the high point of your day.
The entertainment value is high.
The price is exactly right.
If it was $59 , I would never have bought one.
Very nice summing up.
how reliable is the IR measurement?
the values change between? 120 to 140 if I do it several times…
That was rude :D
Are you a girl? 
what porn forum do you like the best ?
Did you send yours back?
How about this light:
The Nitecore EA41 http://www.nitecore.com/productDetail.aspx?id=126#.U8Jaf5SSzBW
There’s a groupbuy going on on this light now:
Guys,
This group buy, after 3 months, has finally ended about 4 hours ago. The final tally is….702 units sold.
I would like to thank everyone who participated in this endeavor.
Special mention to some of our friends who voluntarily cross-posted this gb into the other fora…danjayh, Kevster, M4D M4X, Zerg 32, and to those who I might have failed to mention, you know who you are…again, thanks everyone.
Not possible without these two supporting people too: Dora Wu of Gearbest and Henry Xu of Opus.
Is the new price 59$?
From 36$ to 59$, what a jump in price :)
No simple EEPROM inside, so more advanced users could upgrade?
No, what a great discount it was. 
Can someone tell me what’s the size of power supply connector? I think I read somewhere but cannot find it anymore. Charger is on my way but I want to get better power supply while it’s not here yet.
I thought that 700 units is a lot but
Nitecore D4 has sold ~350 units in a heart beat
and counting
700 is a ton for a groupbuy. Nitecore is a huge company and they make basically the most popular 18650 chargers around.