I'm new and still learning about li-ion rechargeable and have been going through many threads trying to understand more about the dos and don'ts/pros and cons of these batteries. There is lots of info but there are a few things I just don't grasp and to be honest some of the more technical threads are over my head so here are a few questions and things I would appreciate if someone could make a little clearer.
There is a guide for comparing voltage to battery capacity for li ion rechargeable, 4.2 being 100% and 3.5 being empty. I recently performed a runtime test on a 18650 (3100 AW) using a MD2 w/m61w drop-in and I got the following results;
4.16 v @ start
3.80 v @1 hour
3.64 v @1.5 hours
3.54 v @2 hours
3.42 v @2.5 hours
3.22 v @3 hours
2.77 v @3.5 hours
At 2.77 volts I stopped because i was afraid of over discharging the battery however the output was still decent and far from empty. After letting the battery rest for a minute or so voltage went up to 2.78. If 3.5 is empty why is output still good at 2.77? Was the voltage so low because of the load put on the battery during the test (in other words should i have let the battery rest longer then a minute to get a better reading)? Also, I would have expected if the battery was run down so low that the light's output would reflect that with very dim overall light being produced kind of like an incandescent bulb on dying alkalines. Was I wrong to assume this? Also the readings I took were using cotonpickers voltmeter which required me to stop the test and remove the battery for a reading. Is testing in this manner correct or does it produce off results because it just came off a 'load'?
There is a guide for comparing voltage to battery capacity for li ion rechargeable, 4.2 being 100% and 3.5 being empty. I recently performed a runtime test on a 18650 (3100 AW) using a MD2 w/m61w drop-in and I got the following results;
4.16 v @ start
3.80 v @1 hour
3.64 v @1.5 hours
3.54 v @2 hours
3.42 v @2.5 hours
3.22 v @3 hours
2.77 v @3.5 hours
At 2.77 volts I stopped because i was afraid of over discharging the battery however the output was still decent and far from empty. After letting the battery rest for a minute or so voltage went up to 2.78. If 3.5 is empty why is output still good at 2.77? Was the voltage so low because of the load put on the battery during the test (in other words should i have let the battery rest longer then a minute to get a better reading)? Also, I would have expected if the battery was run down so low that the light's output would reflect that with very dim overall light being produced kind of like an incandescent bulb on dying alkalines. Was I wrong to assume this? Also the readings I took were using cotonpickers voltmeter which required me to stop the test and remove the battery for a reading. Is testing in this manner correct or does it produce off results because it just came off a 'load'?
