Hi all,
New to the forums and new to electronics in general so apologies if the following is something straightforward.
I have two rechargeable 12v batteries (of differing mAh) which I can charge off a solar panel I was given. I connect either one these batteries to an adjustable voltage regulator which is turn connected to a USB cable which I cut the end of and exposed the positive and negative wires. I can charge my devices which have the micro USB connector but the charge time(s) is extremely slow. Is this because the 12v batteries don't have enough power (even though it's stepped down to 5v by the regulator) or is something to do with the current being delivered? If it's the latter how can this be increased in order to speed up charging time?
Thanks.
New to the forums and new to electronics in general so apologies if the following is something straightforward.
I have two rechargeable 12v batteries (of differing mAh) which I can charge off a solar panel I was given. I connect either one these batteries to an adjustable voltage regulator which is turn connected to a USB cable which I cut the end of and exposed the positive and negative wires. I can charge my devices which have the micro USB connector but the charge time(s) is extremely slow. Is this because the 12v batteries don't have enough power (even though it's stepped down to 5v by the regulator) or is something to do with the current being delivered? If it's the latter how can this be increased in order to speed up charging time?
Thanks.