This cell ran quite cool when discharged its continuous rating. Even with the accelerated aging caused by using it as a 10A battery, versus as a 4.8A battery, the cycle life would only be reduced down to the level where the other batteries we use are rated, about 200 cycles. Samsung does underrate their cells and this one has a 500 cycle rating at 4.8A. Especially considering that Samsung used 4.8A for their cycle life testing. The datasheet’s mention that the 9.6A continuous current rating given to this cell would result in reduced cycle life made me think it would probably end up being a 7A-8A cell in my testing. While the internal resistance of this Samsung is a bit higher than the Sanyo, causing a bit more voltage sag, the higher capacity of this Samsung helps compensate for that. This cell performs about as well as the 15A 4000mAh Sanyo NCR20700B down to 3.2V. It is about 21mm in diameter and 70mm long. With all the other cells that are available to us this one is a terrible choice and earns a Do Not Buy recommendation from me. I am rating this Brillipower cell at 20A and 2500mAh. It has an exaggerated capacity rating of 2600mAh on the wrap. Its appearance is identical to the Samsung 25R5 but this Brillipower doesn’t perform as well. This cell has “40A max” on the wrap, which is an absurd overrating. I am rating this Brillipower cell at 20A and 2600mAh. Its appearance is identical to the Sony VTC5 but this Brillipower doesn’t perform as well. It cannot be used to compare this battery against any other. If “max” is some sort of “pulse” rating it is useless because we don’t know the pulse length, time between pulses, and the criteria used to set the rating. This cell has “45A max” on the wrap, which is an impossible overrating. I was very close to giving this cell a Do Not Buy recommendation but the use of cells that were not obviously, but might still be, a lower grade means they are just not a great choice considering what else is available. I am rating this Brillipower cell at 20A and 3000mAh. It does perform about as well as a lot of the HG2’s being sold now though and better than it did on my previous test when Brillipower was obviously using lower grade cells (something they do often). Its appearance is identical to the LG HG2 but this Brillipower doesn’t perform quite as well as my reference HG2’s. This cell has “40A max” on the wrap, which is an impossible overrating as there are no 18650’s available with a capacity of 3000mAh or higher that have a current rating over 20A. The two cells that were tested were purchased for that purpose by me. With all the other cells that are available to us, without this degree of overrating and incorrect info, this one is a terrible choice and earns a Do Not Buy recommendation from me. I am rating this Brillipower cell at 15A and 3000mAh. Its appearance is identical, and it’s performance essentially identical, to the Sony VTC6. It uses the chemistry sometimes indicated by the INR prefix. The wrap has “IMR18650” on it but this cell does not use the chemistry associated with the IMR model number prefix. The 3100mAh capacity of this cell is also exaggerated. This is an obscene overrating as there are no 18650’s available with a capacity of 3000mAh or higher that have a current rating over 20A. That’s not a typo, it’s not a 25% overrating.
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