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.
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 cell is a decent performer, about the same as the Samsung 50E but not quite as good as the Molicel M50A and Samsung 50E3. Its 12A rating seems reasonable but must be reduced to 6A if the cells get above 45°C, what many would call “warm”, up to a max of 60°C. This type of derating should be done for any cell in my opinion but Lishen actually specifies the derating in the datasheet, which is great to see.
Note that this cell has a low voltage cutoff of 2.75V versus the more common 2.50V cutoff used by most other cells.
This is a larger cell, the datasheet lists the dimensions as 21.7mm±0.2mm diameter by 70.9mm±0.2mm long.
The two cells I tested delivered 4022mAh and 4048mAh. This is decent consistency and is typical for cells from one of the larger China cell manufacturers.
This cell has a high cycle life rating “
1000th cycle ≥80% of 1st Capacity (25℃±2℃，4.2V-3.0V). If discharged at high rate or high temperature frequently, cell cycle life will be shorten.” But note that the cells were discharged down to 3.0V. Most cycle life ratings are based on cycling the cell down to its low voltage cutoff point, 2.75V in this case. I do not know how much only going down to 3.0V extends cell life but we cannot directly compare this cell’s cycle life spec to a cell that was discharged all the way down each cycle.
Two cells were purchased for testing by me.
Continuous Current Discharge Graphs
Ratings and Performance Specs Graphic
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