Thunderheart Reviews

People usually buy these cells for their capacity/price ratio and 10A max discharge current. Queen Battery sells NCR18650PF for $2.35 and MG1 for $2.20 (shipping not included). As always, and the tests were done using ZKETECH EBC-A20 , which supports up to 20A discharge, 4-wire measurement and is PC-connected. I'm using the v2.5 of my battery holder with 0.3mm thick pure copper pads. I've followed all the prescriptions of the IEC61960-2003 standard concerning battery's capacity measurement. Before each discharging cycle each battery was charged at standard current mentioned in its datasheet to charge end voltage (4.2V) (cut-off at 0.1A, which is the lowest supported by EBC-A20). Before each discharging or charging i've held a 1-1.5hrs pause. The environment temperature was about 25°C. To be sure in results i've done each test minimum twice. Panasonic NCR18650PF This cell was marked C AV 7522 where C is the rank and 7522 is the production date code ...

I've tested 2 old but still good 18650 batteries from LG - HB4 and HB6. They are both rated at 1500mAh and 30A continuous. 1500mAh seems to be ridiculous nowadays but if you buy them at a good price they can be a good choice for using in many high-drain applications (like power tools, for example). My Li-ion battery supplier is Queen Battery , as always, and the tests were done using ZKETECH EBC-A20 , which supports up to 20A discharge, 4-wire measurement and is PC-connected. I'm still using the v2.5 of my battery holder with 0.3mm thick pure copper pads. I've followed all the prescriptions of the IEC61960-2003 standard concerning battery's capacity measurement. Before each discharging cycle each battery was charged at standard current mentioned in its datasheet to charge end voltage (4.2V) (cut-off at 0.1A, which is the lowest supported by EBC-A20). Before each discharging or charging i've held a 1-1.5hrs pause. The environment temperature was about 25...

Hi everybody! I've tested the SANYO UR18650ZTA (4.35/3.7/3.0V) twice - at 4.35V and at 4.20V, which is the charge end voltage for the vast majority of Li-ion cells. The purpose was to find out how much we lose by undercharging a high voltage lithium battery (Li-HV). As always the cell was bought from Queen Battery and tested with ZKETECH EBC-A20 and a self-made battery holder. It's a PC-connected battery tester supporting 4-wire measuring and discharging at up to 20A. I've used the v2.5 of my battery holder I've followed all the prescriptions of the IEC61960-2003 standard concerning battery's capacity measurement. Before each discharging cycle each battery was charged at standard current mentioned in its datasheet to charge end voltage (4.2V/4.35V) (cut-off at 0.1A, which is the lowest supported by EBC-A20). Before each discharging or charging i've held a 1-1.5hrs pause. The environment temperature was about 25°C. SANYO UR18650ZTA There is th...

Hi guys! I've tested the Samsung INR21700-30T (35A) at currents up to 20A (limited by my battery tester). As always the cell was bought from Queen Battery and tested with ZKETECH EBC-A20 and a self-made battery holder. It's a PC-connected battery tester supporting 4-wire measuring and discharging at up to 20A. I've used the v2.5 of my battery holder I've followed all the prescriptions of the IEC61960-2003 standard concerning battery's capacity measurement. Before each discharging cycle each battery was charged at standard current mentioned in its datasheet to charge end voltage (4.2V) (cut-off at 0.1A, which is the lowest supported by EBC-A20). Before each discharging or charging i've held a 1-1.5hrs pause. The environment temperature was about 25°C. Samsung INR21700-30T The cell is marked as INR21700-30T SAMSUNG SDI 2HC2 The main specs from Samsung 30T datasheet (pdf) : Minimum capacity: 3000mAh Nominal voltage: 3.6V Standard charge...

Hi guys! I've tested two high capacity 21700 cells - LG M50 (5000mAh) and Samsung 48G (4800mAh). The latter i had already tested before and the re-testing of another cell showed almost no difference with previous test results. The M50 is a new cell which is being sold as 10A one, but in its datasheet the maximum discharge current is mentioned as 7.28A. Nevertheless i've also discharged it at 10A to look at it's behavior. The cells i've bought from Queen Battery . As always, I've tested with ZKETECH EBC-A20 and a self-made battery holder. It's a PC-connected battery tester supporting 4-wire measuring and discharging at up to 20A. I've used the v2.5 of my battery holder I've followed all the prescriptions of the IEC61960-2003 standard concerning battery's capacity measurement. Before each discharging cycle each battery was charged at standard current mentioned in its datasheet to charge end voltage (4.2V) (cut-off at 0.1A, which is th...