Panasonic 3400mah are always good to carry and then some of the high drain batteries.
If you just stick with the most popular cells found on this site you can’t go wrong.
30Q’s and NCRB’s are a great start
2 A. Recommended for stock:
Samsung 25R, 30Q
Panasonic batteries
2. A. Recommended for stock: INR 3500 mAh button top
Thanks!
Country + shipping methods+ shipping Costs+ Order time & Arrivial time.
Spain + unregistered + free shipping + order process about a day… arrival time about a month
1. I have purchased Lithiums from Gearbest but not via the USA Registered carrier.
B. I really like Samsung and Olight batteries, they never failed me (recommendation for stock)
10440 ,sanyo 14500, sanyo 16650,aspire 18350 and some cheap samsung 30q’s and Lg hg2’s
PLEASE FIND A SHIPPING METHOD FOR GREECE
Please find a shipping method for South Africa!
1. I have purchased batteries in the past from Gearbest but not with the USA Registered option.
2. I would recommend Panasonic, Samsung, or similar brand quality cells.
2.1 PLEASE FIND a shipping method for European countries, I am no longer able to buy/ship cells to my friends and family in Europe. 
2. I think the favorite of most of us here is Panasonic NCR18650B
Liitokala 26650 should be restocked
3. Hungary, and you ship batteries to us again with registered airmail for $2.39
Have you ordered batteries from Gearbest by upgraded USA Registered?
NO, I live in europe
Which item you recommend for full stocks?
Sanyo/Panasonic NCR18650GA 3500mAh (for max runtime) and samsung 30Q (for maximun output)
Which one you wanna get @ below-cost price
sanyo/panasonic NCR18650GA
Your country, + avaliable ways for Batteries Shipping.
Belgium: swedish registered post 3.69 Euro
shipping cost is not bad but free is better. I could get an extra battery for the shipping cost.
Wow I take that back, looking at what other people payed for shipping I payed way to much. Euro 3.69= $4.2 VS free shipping to Holland and $2.39 to hungary. That a huge price difference for such a small amount. And holland is right next door to me. I have had (some) Holland postal service delivering orders to my door.
Agree with the others, panny-Bs and sanny-As are the most common, and LK 26650s are also Highly Regarded (eg, for my F13, L2, other 26mm lights).
I recently ordered some VTC6s from you, but I believe it was just before you began offering the USA registered option. I will likely order more cells in the future. I recommend taking great care in packaging the cells for shipments. It’s important to ensure they’re well protected on their journey overseas.
I would love for you to start carrying some of the smaller sized cells (I think DavidEF mentioned them above). Cells like the 10180 and the 14250 are great for small project lights but they’re harder to find.
Thanks!
Protected Panasonic 3400mah.
Option 3
Spain. Registered airmail for Free. Estimated arrival time between 2 and 7 weeks
Hello, everyone, hope we can resume the GAW when weekend come here with a welcome-hug,
Winner will be selected here, next Wednesday, and your gifts will be dispatched @ Next Friday 
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3. There’s no way to ship batteries to Vietnam
I’m not having much luck finding a reputable shop/dealer that can ship batteries at a reasonable cost (NOT $40 to ship 6 18650 batteries).
2A. Recommended for stock: Samsung 18650-30Q unprotected and unprotected button top, Aspire 18350 1200mAh
3A: shipping country Germany, in the past I ordered multiple times with unregistered mail, they arrived all well, just one time wrong type was sent,
but for a while no shipping possible