Here's what that link says:
"Panasonic NCR18650B 3400mAh rechargeable Li-Ion Battery
Non protected ICR"
ICR - Lithium-cobalt. They are standard unprotected Li-ions.
Here's what the ECF Guide on rechargeable batteries strongly recommends:
"
DO NOT USE UNPROTECTED RECHARGEABLE LI-ION BATTERIES IN AN APV
Use safer-chemistry batteries such as Li-Mn or protected Li-ion
Rechargeable batteries
We now advise that Li-Mn or top-quality Li-FePo4 rechargeables are used in APVs, in preference to rechargeable Li-ions. We suggest the best option, in order, is:
1. AW IMR Li-Mn rechargeables.
2. AW Li-FePo4 rechargeables [Li-FePo4's MUST HAVE A SPECIAL CHARGER]. Note that these batteries are mostly 3 volt nominal so the system voltage will be lower than normal.
3. Good quality (such as AW or Pila) protected Li-ion rechargeables.
4. Branded protected Li-ions come next - such as xxxfire Li-ion rechargeables (for xxx insert Trust / Sure / Ultra-).
5. The least-preferable option is a generic protected Li-ion.
6.
Unprotected rechargeable Li-ion cells should not be used.
7. Standard cells (non-rechargeable) should not be used."
http://www.e-cigarette-forum.com/forum/ecf-library/129569-rechargeable-batteries.html
Added this post to respond to your edit.
Those sort of batteries are not recommended for use in APVs. Search the forum - you'll see IMRs or the hybrid Panasonics are the ones that are safer. As well as the ECF guide put together by a group of members who know their stuff.