AmpMax 18650 2900mAh (Black)



Official specifications:

• Original Panasonic cell from Japan
• Built-in protection circuit, guards against over-charge, over-discharge and over-current
• Triple MOS's for superior high current discharge
• Improved voltage stability due to low internal resistance
• PET sheath, environmentally friendly and not easy to crack
• Steel flat button design
• Voltage: 3.7V (4.2V when fully charged)
• Capacity: 2900mAh (discharged at 0.2C)
• Max discharging current: 10A+/-0.5A
• Over-discharge detection voltage: 2.5V
• Dimensions:18.4 mm x 68.6 mm (+/-0.2mm)
• Current over-flow protection: 5A+
• Weight: 48g

The cell used can be discharged down to 2.5 volt, in my test I only discharges to 2.8 volt, i.e. I do not measure the full capacity. But then, not all lights will be able to use the full capacity.









Slightly less capacity than a 3100mAh battery and the battery has a slightly lower price.















Conclusion

This battery uses a good cell, this secures many things:

• The batteries does match in capacity, i.e. they can be used in series.
• The battery is very safe.
• The battery has the specified capacity.

All in all a very good battery.



Notes and links

The batteries was supplied by AmpMax/AmpMaxWorld 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