I just build a Cree xhp70.2 6v, can someone advice what is the battery life if I pair it with 7.4v 6800mah 100c rating battery, or 21700 7.4v 18ah battery.
depends on the current obviously
i mean you could probably run 2A through the led, if the heat sinking is good, that might be 9 or 3.4 hours
does not really depend on the LED, other than the LED may determine the current, depending on how your driver works
100C rating from a 6800mAh battery doesn’t look correct. At most 18650 can run at 10-15C, anything more probably is overrated. LPF can have 30C rating but that’s because capacity is 1/3 to 1/2 of 3.7V Li-Ion, actual discharge rating doesn’t exceed 35A.
yes will be running less then 2A most of the time so now is to consider what battery to use the rc car lipo pack 7.4 6800mAh 100c or 21700 7.4v 2s4p 18AH for the maximum runtime, so base on the calculation you stated, i will have abt 9hrs of usage if i go with the rc car lipo pack?