These tests below only note my personal opinion for the 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, EVE, Ampace, Sinowatt, Lishen, BAK, or Sanyo can change at any time! This can be 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. Never use them outside of a fully protected battery pack and you use them at your own risk. Never exceed the battery’s true continuous discharge rating (CDR), never let it get colder than 0°C or hotter than 60°C to help lower the risks and extend cell life, and keep the plastic wrap and top insulating ring in perfect condition. Never use a battery that is physically damaged in any way.

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
An average performer. The EVE 58E and Samsung 55E run for a bit longer, probably enough to be noticeable in most applications. If this cell is available at a lower cost though that could make it worth considering.

This is not a power cell. Like all the ultra-high capacity cells it is made to be used gently. You will not get extra run time from its 5800mAh capacity if you run it hard since its internal resistance will cause a lot of voltage sag (which shortens run time).

Stay below 2A-3A or so if you want to try to get the extra run time this cell can offer.

The datasheet specs and some comments…

• 5650mAh minimum/5800mAh typical capacity.
• 16.95A max continuous discharge rating but the datasheet mentions this will shorten cycle life. I agree since the cell reaches its temp limit at about 12A.
• The LR2170SK’s temperature limit is low, 60°C.
• We can give this cell a 17A temp-limited, non-continuous rating as long as you stop before the cell reaches 60°C.
• 1.1A standard charge rate, 4A max continuous charge rate (at room temp), 5.6A max non-continuous charge rate (this will shorten cycle life).
• The capacity of the two cells I tested was very inconsistent, 5781mAh and 5851mAh, but that doesn’t appear until you get below 2.9V or so. Still, it can mean these might be lower grade cells…I don’t know. Hopefully we have more consistent cells becoming available in a few months.
• I’ll be rating this cell at 5750mAh since I cannot have the lowest capacity cells in the batch.
• The datsheet notes that charging/discharging at high rates or above 35°C (just a bit warm!) that cycle life is shortened. This temp can easily be reached in a sealed up battery pack being used at fairly low current levels.
• The datsheet also notes that charging/discharging the cell to above 60°C can cause safety issues. NEVER ALLOW THE CELL TO GO ABOVE 60°C!
• Stay below 50°C if you’re using a thermistor (which is slow) for temperature sensing until you can verify with a thermocouple or IR camera what your max temp actually is.

Continuous Current Discharge Graphs



Ratings and Performance Specs Graphic



18650 Ratings & Performance Table:


21700 Ratings & Performance Table:

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