Just been looking for another cell for my trustfire mini-01 and iv noticed the xtar 16340 i have been using up to now is only 3.6 volt?? so if i get this aw cell will it be brighter?
There won't be any difference. One has a slightly different chemistry which means it has a nominal voltage of 3.6 instead of 3.7 but they both still charge up to 4.2. In this case what really matters is the ability to supply high amperage not so much .1 volts.
I thought so… i got confused as yes, it does charge to 4.2 volts and it got me wondering why on earth it had 3.6 volt on the side of it…. thanks for letting me know 
There’s no difference in chemistry nor voltage. How they choose to label it is somewhat arbitrary.
As I understand it the difference is in the positive electrode. The 3.6 volt batteries are Li2FePo4F and the 3.7 volt batteries are LiCoO2.
Taken from Wikipedia.
Positive electrodes| Electrode material | Average potential difference | Specific capacity | Specific energy |
|---|---|---|---|
| LiCoO2 | 3.7 V | 140 mA·h/g | 0.518 kW·h/kg |
| LiMn2O4 | 4.0 V | 100 mA·h/g | 0.400 kW·h/kg |
| LiNiO2 | 3.5 V | 180 mA·h/g | 0.630 kW·h/kg |
| LiFePO4 | 3.3 V | 150 mA·h/g | 0.495 kW·h/kg |
| Li2FePO4F | 3.6 V | 115 mA·h/g | 0.414 kW·h/kg |
| LiCo1/3Ni1/3Mn1/3O2 | 3.6 V | 160 mA·h/g | 0.576 kW·h/kg |
| Li(LiaNixMnyCoz)O2 | 4.2 V | 220 mA·h/g | 0.920 kW·h/kg |
Is the Xtar Li2FePo4F? That’s not common in low priced 16340 cells.
Just looked on the side of it and this is whats on it……
Li-ion Rechargeable 3.6 V 600mAh
LIR123A
I do not know, I am just going off of the markings on the cell and the wikipedia article. I have not seen anything that states the battery type. Also the Xtar isn't particularly cheap.
Well, it’s priced similar to standard trustfire 16340’s: http://www.szwholesale.com/2pcs-xtar-16340-600mah-battery-p-3850.html
That is not including shipping.
Check their site for price of trustfires.