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

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

LiitoKala 26700 4000mAh Lii-40E (Orange)
DSC_3783
Official specifications:


  • Battery Type: Rechargeable Lifepo4
  • Nominal Capacity: 4000mAh , Real
  • Nominal Voltage: 3.2v 3.3v
  • Battery Dimension: 26.5×71mm(±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
A LiFePO4 in 26650 size with fairly good capacity.
DSC_3782
DSC_3784 DSC_3785
DSC_3786
DSC_3787
LiitoKala%2026700%204000mAh%20Lii-40E%20(Orange)a-Capacity
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
LiitoKala%2026700%204000mAh%20Lii-40E%20(Orange)a-Temp-15.0
LiitoKala%2026700%204000mAh%20Lii-40E%20(Orange)a-Temp-30.0
LiitoKala%2026700%204000mAh%20Lii-40E%20(Orange)a-CapacityTimeHours
LiitoKala%2026700%204000mAh%20Lii-40E%20(Orange)a-CapacityTime
LiitoKala%2026700%204000mAh%20Lii-40E%20(Orange)a-Energy
LiitoKala%2026700%204000mAh%20Lii-40E%20(Orange)a-PowerLoadTime
LiitoKala%2026700%204000mAh%20Lii-40E%20(Orange)a-TripCurrent
LiitoKala%2026700%204000mAh%20Lii-40E%20(Orange)a-Charge
Discharge-LiitoKala%2026700%204000mAh%20Lii-40E%20%28Orange%29a-pulse-1.0%2010%2010-IR
Conclusion
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.
Notes and links
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

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Barkuti
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Around 2/3 the energy density to weight ratio versus a Power Long Battery 26650 NMC cell (LiitoKala Lii-50A, for example). I wonder who makes these, seem very suitable for e-bike or other sort of short range / urban vehicle batteries with high cycle life, for example. They feature a small voltage depression at ≈70% DoD and on, I'd say that is intended to ease the life of battery SoC measurement electronics.

They can be purchased in their genuine wraps here and there (for example):

 

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Superstocker
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Thanks HKJ!

Hobbyfotograaf
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Location: Belgium

Thank you for the review of these cells.
I have built a 12V (4S) battery pack with these cells, and it works very well.

This is the BMS used for the battery pack: https://nl.aliexpress.com/item/32976068743.html?spm=a2g0s.9042311.0.0.27...

I use this charger: https://nl.aliexpress.com/item/32866007777.html?spm=a2g0s.9042311.0.0.27...