Bench Test Results: Lishen LR2170LA - 45A 4000mAh 21700…good performer but P42A a bit better

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Mooch

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These tests below only note my personal ESTIMATED ratings for the batteries I tested at the time I tested them. Any battery that is not a genuine Samsung, Sony, Murata, LG, Panasonic, Molicel, or Sanyo can change at any time! This is one of the hazards of using “rewrapped” or batteries from other manufacturers so carefully research any battery you are considering using before purchasing.

Misusing or mishandling lithium-ion batteries can pose a SERIOUS RISK of property damage, personal injury, or even death. They are not supposed to be used outside of a fully protected battery pack and you use them at your own risk. Never exceed the battery’s true continuous current rating and keep the plastic wrap and top insulating ring in perfect condition.

Testing batteries at their limits is dangerous and should never be attempted by anyone who has not thoroughly studied the dangers involved, understands the risks, has the proper equipment, and takes all appropriate safety precautions.

If the battery has only one current rating number, or if it only says "max", then I have to assume the battery is rated at that current level for any type of discharge, including continuous.

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Test Results
Lishen is one of the large, established cell manufacturers in China (天津力神电池股份有限公司). This is a decent performing cell, about equal in performance to the other Lishen 4000mAh-5000mAh 21700’s at 10A. The Molicel P42A outperforms this cell by a bit at 10A, 20A, and 30A.

This cell’s 45A datasheet rating is temperature-limited, it is not a true continuous current rating you can use to compare against other cells. If you use this cell at 45A you must never let the cell reach 80°C (very hot) and any use at 45A will shorten this cell’s cycle life. I recommend using this cell at 30A or lower to reduce risk, increase performance (less voltage sag), and to extend cell life. If this cell is available at a lower price and the Molicel P42A is not in stock this is still a good cell though and I don’t think you’ll see too much difference between it and the Molicel P42A.

The two cells I tested delivered 4021mAh and 4038mAh. This is decent consistency and is typical for cells from one of the larger China cell manufacturers. This cell has a pretty standard cycle life rating in the datasheet but I have not tested that yet.

Two cells were purchased for testing by me.


Continuous Current Discharge Graphs
708C9CED-FBCA-4026-82C1-682611F877C9.jpeg B167DDAD-4B28-4A4E-ACAF-CC55AC4E8B2E.jpeg


Ratings and Performance Specs Graphic
CA809B5D-8F8D-4D00-A3C9-7A72C6B28CCD.jpeg

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To see how other cells have tested check out this link: List of Battery Tests | E-Cigarette Forum
 
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