UltraFire XSL18350 1200mAh (Orange)

I got this battery from two sources with a few months between.

Sample from LightCastle



Official specifications:

• RechargeableYes
• Lithium Ion XSL 18350 cylindrical rechargeable batteries
• Typical Capacity: 1200mAh

As usual with cheap batteries, the capacity is considerable lower than specified.










As long as the battery is keep at low currents it works fine, but drawing 2A or more the batteries looses capacity and they do not track.















Sample from DealExtreme



Official specifications:

• Lithium Ion XSL 18350 cylindrical rechargeable batteries
• Typical Capacity: 1200mAh

Again the capacity is lower than specied.










These cells has less capacity, than the first batch, this may be due to age (Note: I did test them in December).
They have the same problem with currents above 2A as the above cells.















Conclusion

These batteries are acceptable for cheap batteries.



Notes and links

One of the sets was supplied from LightCastle for review.

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
Comparison to other LiIon batteries