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Q: Greetings, can you connect directly a 18650 battery 3.7v?

Asked by luis miguel on 2018-09-28 03:59:19

electronicNerd NO!!!, A fully charged Lithium-cell is 4.25 volt! Further more, when it's half discharged the voltage will drop below 3.6 volt. Fully discharged a Lithium-cell will drop to 2.5 volt. You will have ... See More

2019-07-13 13:19:50 Helpful (1)
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electronicNerd Use a resistor in stead of cutting a diode, If the chain is using that much, they have forgotten the serial resistor! Use a resistor approx 10 ohm, gives you a comsumption of about 250mA. Be car... See More

2019-07-05 08:14:45 Helpful (0)
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electronicNerd They have forgotten the resister that should have been in series with the LED's, Use a 4.7 or 10 ohms resister in series with the LED's will give you 0.5 or 0.260 Amps! Those I got is mounted with a ... See More

2019-07-05 07:48:30 Helpful (0)
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Q: how many mAh battery including ?

Asked by AnKuR on 2018-06-06 11:05:59

electronicNerd The battery is only a +400mA battery, not 3000 as stamped. Tested 2 different lamps and the summa-current put into the battery was 428mA and 431mA

2019-06-12 07:26:56 Helpful (4)
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electronicNerd I have just tested the battery, You can expect it fully charge within 1-1½ hour with a less than 1 Amp PSU as I measured the battery capacity to about 420-430mA

2019-06-09 12:06:41 Helpful (1)
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