Panasonic NCA Li-ion battery cells: the PTC switch

Unlike NCR18650PF and NCR18650B cells used in e-bikes, laptops, portable scientific or medical devices, the NCR18650GA and NCR20700B / NCR20700A haven’t built-in a PTC switch. Without this are truly bare-bones cells releasing all power for the drone! Note: A PTC switch (positive temperature coefficient) adds internal resistance (Ω), thus reducing performance.  


How can you prolong the lithium-ion battery lifespan. A partial discharge reduces stress and prolongs battery life, so does a partial charge. Batteries charging to 85% have a longer lifespan than enabling full charge. Although longer lasting, a less than full cycle does not fully utilize a battery. 100% DoD is a full cycle; 10%…

Panasonic NCR18650GA Battery Testing Chart

EXTRON LiPo vs. Panasonic NCR18650GA vs. LG 18650HG2 Test date: April 2017. Subject: Panasonic Sanyo NCR18650GA 3.6V 3500mAh 10A Lithium-ion battery cell, with specific energy more than 250 Wh/kg. The tests have been performed under certain battery stress applied conditions to achieve a goal of the unmanned aircraft – Project DELFTACOPTER Result: The Panasonic NCR18650GA cells clearly show a better…

Panasonic NCR18650GA

Panasonic NCR18650GA cylindrical cells, with LiNiCoAlO2 chemistry.     Read also: Sanyo-Panasonic NCR18650GA Battery Testing Chart