EBL 18650 Lithium Ion "3000mAh" Battery

The battery can be purchased for less than $2 a piece.   But it is a little skeptical that the capacity is actually 3000mAh.  The weight is about 44g, which seems reasonable, perhaps 3-4g short of other comparable cells.  The EBL battery seems to be Ultrafire repackaged: the labeling is similar down to the misspelling of "Sheef-life".  One "official specification" found on another online review site is

• Genuine Ultrafire 3000mAh 18650
• Real capacity: 2900mAh (-100mAh / + 100mAh)
• Internal PCB protection prevents under-voltage at 2.5V and over-voltage at 4.25V. UNIQUE INTERNAL PCB!
• Diameter 18.6+/-0.2 mm (Note: Diameter may not fit all flashlights)
• Height 66.5+/- 0.2mm
• Weight (Typical) Approx. 46 g
• Nominal Voltage: Average 3.7V
• Cut-off Voltage: 2.5V
• Internal Impedance: less or equal to 180 milli-ohm (with PTC)
• Cycle Performance: 90% of initial capacity at 400 cycles
• Cycle life: > 500 cycles
• Charge: Current = 0.5C mA Voltage = 4.2 V End Current = 0.01 mA
• Discharge: Current = 0.5C mA End Voltage = 3.0V

The first discharge test with constant resistive load of 5 Ohms; the battery drains to 3V in about 3hrs.  Integrating the discharge current shows about 2300mAh.  The voltage falls off quickly at around 3.3V.  Discharging with 35-Ohm resistive load yields about 2400mAh.  The integration of charging current back to full capacity also shows about 2300-2400mAh.  So it only has 80% of the stated capacity.  It is in general agreement with measurement by other people.