Thunderheart Reviews

I've tested cylindrical cells of different sizes - from 10440 to 28600, but it's the first time i've got an 18350 cell. Queen Battery QB18350 is a 900mAh cell rated at 9A max. It has the same 18mm diameter as any 18650 cell but is 30mm shorter - the length is 35mm. Here it is together with a 10440 (AAA), a 14500 (AA) and an 18650 cell: The battery was bought from Queen Battery which is my reliable supplier of genuine cells 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 version 3.0 of my battery holder based on 0.5mm thick pure copper terminals I've followed all the prescriptions of the  IEC61960-2003  standard concerning battery's capacity measurement. Before each discharging cycle the battery was charged at standard charge current mentioned in its datasheet to charge end voltage. Before each discharging or charging

Less than a month ago i tested Samsung 29E v.6 which many people say is a better cell than the v.7. This time i've tested the v.7 cell and compared them to find out where is the truth. Just to remind, Samsung 29E is a 2900mAh 18650-size cell which supports discharge at up to 5.5A. The battery was bought from my reliable supplier ( 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 version 3.0 of my battery holder based on 0.5mm thick pure copper terminals 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 charge current mentioned in its datasheet to charge end voltage. Before each discharging or charging i've held a 1-1.5hrs pause. The environment temperature was 23.0-24.5°C. To be sure in res

LG INR21700 M50T is a 5000mAh Li-ion cell of 21700 size (also known as 2170). LG M50T was previously known as M50 (without T) and even in the tentative version of the datasheet the model name was M50. More than a year ago i tested it (Grade B) and compared with Samsung 48G but then i was using v2.5 of my battery holder. This time i've tested a Grade A cell with the latest v3.0 holder. The battery was bought from  Queen Battery  which is  my reliable supplier of genuine cells  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 version 3.0 of my battery holder based on 0.5mm thick pure copper terminals I've followed all the prescriptions of the  IEC61960-2003  standard concerning battery's capacity measurement. Before each discharging cycle the battery was charged at standard charge current mentioned in its datasheet to charge end volt

This is the 3rd 18650-size model in Queen Battery's lineup. The 3000mAh low-drain and 2600mAh mid-drain ones I've already tested. This one is rated at 2000mAh and supports continuous discharge at up to 20A. The battery was bought from  Queen Battery  which is  my reliable supplier of genuine cells  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 version 3.0 of my battery holder based on 0.5mm thick pure copper terminals I've followed all the prescriptions of the  IEC61960-2003  standard concerning battery's capacity measurement. Before each discharging cycle the battery was charged at standard charge current mentioned in its datasheet to charge end voltage. Before each discharging or charging i've held a 1-1.5hr pause. The environment temperature was 25 ±2 °C. To be sure in results i've done each test  minimum twice  (

Queen Battery QB26650-2500 is a 26650 size 2500mAh 50A LiFePO4 cell which supports up to 125A pulse discharge. The battery was bought from  Queen Battery  which is  my reliable supplier of genuine cells  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 version 3.0 of my battery holder based on 0.5mm thick pure copper terminals I've followed all the prescriptions of the  IEC61960-2003  standard concerning battery's capacity measurement. Before each discharging cycle the battery was charged at standard charge current mentioned in its datasheet to charge end voltage. Before each discharging or charging i've held a 1-1.5hr pause. The environment temperature was 25 ±2 °C. To be sure in results i've done each test  minimum twice  (usually 3-7 times). Queen Battery QB26650 2500mAh The heat shrink tube tells us only the model, capacit

18500 shares the same 18mm diameter with 18650 but it's 15mm shorter (18x50mm). This size is often used in digital cameras' battery packs, usually in 2S configuration. Panasonic NCR18500A is 2000mAh rated cell which supports continuous discharge at up to 4A. The battery was bought from  Queen Battery  which is  my reliable supplier of genuine cells  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 version 3.0 of my battery holder based on 0.5mm thick pure copper terminals I've followed all the prescriptions of the  IEC61960-2003  standard concerning battery's capacity measurement. Before each discharging cycle the battery was charged at standard charge current mentioned in its datasheet to charge end voltage. Before each discharging or charging i've held a 1-1.5hr pause. The environment temperature was 23.0-24.5°C.