Test/review of LiitoKala 26700 4000mAh Lii-40E (Orange)

HKJ

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Mar 26, 2008
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[size=+3]LiitoKala 26700 4000mAh Lii-40E (Orange)[/size]

DSC_3783.jpg


Official specifications:
  • Battery Type: Rechargeable Lifepo4
  • Nominal Capacity: 4000mAh , Real
  • Nominal Voltage: 3.2v 3.3v
  • Battery Dimension: 26.5x71mm(±0.02mm)
  • Battery Weight: About 93g
  • Internal Resistance: less than 20 mohms
  • Cycle life: More than 2000 times, DOD at 80%
  • Input Charging Voltage: 3.65v/cell
  • Input Charging Current: 2A
  • Continuous Discharging Current: 3C
  • Max Current Discharge: 5C
  • Discharge cut-off Voltage: 2.50v/cell
  • Charging Temperature: 0°C ~ 45°C
  • Discharging temperature: -20°C ~ 60°C
  • Storage temperature: -20°C ~ 45°C

LiitoKala%2026700%204000mAh%20Lii-40E%20(Orange)a-info.png


A LiFePO4 in 26650 size with fairly good capacity.

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LiitoKala%2026700%204000mAh%20Lii-40E%20(Orange)a-Capacity.png


The two cells matches very nicely and can deliver the rated 3C or 12A.

LiitoKala%2026700%204000mAh%20Lii-40E%20(Orange)a-Temp-10.0.png


LiitoKala%2026700%204000mAh%20Lii-40E%20(Orange)a-Temp-15.0.png


LiitoKala%2026700%204000mAh%20Lii-40E%20(Orange)a-Temp-30.0.png


LiitoKala%2026700%204000mAh%20Lii-40E%20(Orange)a-CapacityTimeHours.png


LiitoKala%2026700%204000mAh%20Lii-40E%20(Orange)a-CapacityTime.png


LiitoKala%2026700%204000mAh%20Lii-40E%20(Orange)a-Energy.png


LiitoKala%2026700%204000mAh%20Lii-40E%20(Orange)a-PowerLoadTime.png


LiitoKala%2026700%204000mAh%20Lii-40E%20(Orange)a-TripCurrent.png


LiitoKala%2026700%204000mAh%20Lii-40E%20(Orange)a-Charge.png


Discharge-LiitoKala%2026700%204000mAh%20Lii-40E%20%28Orange%29a-pulse-1.0%2010%2010-IR.png




[size=+3]Conclusion[/size]

This is a good LiFePO4 battery and as usual for this type it has very stable output voltage and less energy contents than the more common LiIon types, but longer life.



[size=+3]Notes and links[/size]

The batteries was supplied by a reader 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
Graphical comparison to 18650 and other batteries
Table with all tested LiIon batteries
 

raggie33

*the raggedier*
Joined
Aug 11, 2003
Messages
13,454
im so grateful for all your work and reviews ive spent much time on your webpage
 

abhi555

Newly Enlightened
Joined
May 27, 2006
Messages
43
Location
Idaho
Nice, 30 A must be brutal for any cells.
can lifepo4 charged quickly if charger can deliver more than 1A constant current (as per tests), any damage it can cause in this case?
 
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