Xtar 18700 2600mAh (Black)


DSC_0311

Official specifications:
Xtar%2018700%202600mAh%20(Black)-info

The battery is called 18700, because it is nearly 70 mm long, but protected 18650 can be just as long, only unprotected batteries are 65 mm long.

DSC_0314 DSC_0315

DSC_0312
DSC_0313

Xtar%2018700%202600mAh%20(Black)-Capacity

This battery has a high voltage at low loads.

Xtar%2018700%202600mAh%20(Black)-CapacityTimeHours

Xtar%2018700%202600mAh%20(Black)-CapacityTime

Xtar%2018700%202600mAh%20(Black)-Energy

Xtar%2018700%202600mAh%20(Black)-PowerLoadTime

Xtar%2018700%202600mAh%20(Black)-TripCurrent

The two batteries has slightly different internal resistance and trip current (This might be related).

Xtar%2018700%202600mAh%20(Black)-Charge



Conclusion

The high voltage can be an advantage in smaller (i.e. 3-4 watt) lights where the battery replaces two CR123 cells.
It is a very good battery.



Notes and links

How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries