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Queen Battery QB14500 700mAh - a 3.7V AA-size Li-ion battery's capacity test

14500 is the same well-known AA size we used to see. It means that the diameter of the cell is 14mm and it's 50mm long. 14500 is used to refer to 3.7V Li-ion or 3.2V LiFePO4 cells while AA is for 1.5V alkaline/other primary batteries and 1.2V Ni-Cd or Ni-MH rechargeable cells. Let's look at the difference in size between AA/14500 and other popular formats: From the top to the bottom and the left to the right there are AAA/10440, AA/14500, 18650, 26650 and the new 26800 size. Queen Battery QB14500  is a flat-top unprotected 700mAh-rated cell which also can be ordered with add-on protection PCB and button-top cap. 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

Samsung 29E version 6 (29E6) 2900mAh cell's capacity test

Samsung INR18650-29E is available in 2 versions - version 6 (29E6) which is the hero of this test, and version 7 (29E7). Visually they differ by heat shrink tube color and the version is printed under "SAMSUNG" in marking. 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

Samsung 26J (26JM) 2600mAh cell's capacity test

Samsung ICR18650-26J is a 2600mAh Li-ion cell of 18650 size which supports continuous discharge at up to 5.2A. 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 results i've done each test  minimum twice  (usually 3-4 times). Samsung ICR18650-26J The c ell is  marked as  ICR18650-26J M  SAMSUNG SDIEM THR 2   which means that the 

Queen Battery QB10440 300mAh - a 3.7V AAA-size Li-ion battery

10440 size is more known as AAA - it means that the cell is 10mm in diameter and 44mm long. In Lithium world 10440 is a rare size but you can find 3.2V LiFePO4 and 3.7V Li-ion models just by googling "10440". To feel the difference let's take a look at 10440 (AAA) next to 14500 (AA) and 18650: This review's hero, Queen Battery QB10440 , is a flat-top unprotected 300mAh-rated cell which also can be ordered with add-on protection PCB and button-top cap. 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

Queen Battery QB18500 1600mAh - shorter than 18650

18500 cells share the same 18mm diameter with 18650 cells but are 15mm shorter - their length is 50mm vs 65mm in case of 18650. QB18500 is a 1600mAh low-drain cell which supports continuous discharge at 1.6A max. 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. To be sure in results i've done each test  minimum twice

Sanyo UR18650ZK - low drain 2500mAh cell's capacity test

Sanyo UR18650ZK is a low-priced low-drain 18650 Li-ion cell which is made by Sanyo in Nanjing, China. It's one of those cells without any datasheet available across the web. 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 results i've done each test  minimum twice  (usually 3-4 times). Sanyo UR18650ZK As always Sanyo didn&#