Hello,
I decided to try Zebralight 18650 batteries and bought the following ones:
a) the red battery, Sanyo NCR18650GA 3500mAh 10A 18650 Li-ion Flat Top, paid 6 USD (on sale);
b) the green battery, Sony US18650VTC6 3000mAh 30A High Discharge Flat Top, paid 6 USD (on sale);
c) Zebralight branded battery, ZL635 3500mAh 18650 Protected Li-ion Battery, paid 12 USD (on sale);
I have a lot of pictures but since I cannot post them on the forum I will mostly provide the info in the text form.
***********
First thing to check is the check of capacity. I used IQ338 XL and measured discharge capacities of each battery:
1) Sanyo NCR18650GA - 3260 mAh, internal resistance 32 mR;
2) Sony US18650VTC6 - 2899 mAh, internal resistance 44 mR;
3) ZL635 - 3361 mAh, internal resistance 33 mR;
I am pretty confident that my IQ338 XL measures the capacity correctly, I have another charger (MAHA C9000) and in the past I measured the capacity of other batteries on both charges - they matched.
Another thing I was interested in is the voltage drop under the load (the current is 1A). I made a small rig to measure the voltage correctly, there is the picture:
1) Sanyo NCR18650GA, Voltage without the load: 4.173V Voltage under the load: 4.013, current: 0.965A;
2) Sony US18650VTC6, Voltage without the load: 4.182V Voltage under the load: 4.072, current: 0.946A;
3) ZL635, Voltage without the load: 4.174V Voltage under the load: 4.044, current: 0.972A;
to be continued;
I decided to try Zebralight 18650 batteries and bought the following ones:
a) the red battery, Sanyo NCR18650GA 3500mAh 10A 18650 Li-ion Flat Top, paid 6 USD (on sale);
b) the green battery, Sony US18650VTC6 3000mAh 30A High Discharge Flat Top, paid 6 USD (on sale);
c) Zebralight branded battery, ZL635 3500mAh 18650 Protected Li-ion Battery, paid 12 USD (on sale);
I have a lot of pictures but since I cannot post them on the forum I will mostly provide the info in the text form.
***********
First thing to check is the check of capacity. I used IQ338 XL and measured discharge capacities of each battery:
1) Sanyo NCR18650GA - 3260 mAh, internal resistance 32 mR;
2) Sony US18650VTC6 - 2899 mAh, internal resistance 44 mR;
3) ZL635 - 3361 mAh, internal resistance 33 mR;
I am pretty confident that my IQ338 XL measures the capacity correctly, I have another charger (MAHA C9000) and in the past I measured the capacity of other batteries on both charges - they matched.
Another thing I was interested in is the voltage drop under the load (the current is 1A). I made a small rig to measure the voltage correctly, there is the picture:
1) Sanyo NCR18650GA, Voltage without the load: 4.173V Voltage under the load: 4.013, current: 0.965A;
2) Sony US18650VTC6, Voltage without the load: 4.182V Voltage under the load: 4.072, current: 0.946A;
3) ZL635, Voltage without the load: 4.174V Voltage under the load: 4.044, current: 0.972A;
to be continued;
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