Hi, I couldn't find a sub-forum about batteries, so I thought I'd post it here.
Just need your thought on what just came to my mind about battery chargers. So I'm using a regular charger, right. It's rated at 1A, 4.2V output. I'm noticing that the time it took to charge a 50% battery is longer than what it should, compared to charging an empty one (I know it's not completely empty, but empty according to my mod). For example, say the time to charge an empty one is 4 hours, then the time to charge a 50% one should be around 2 hours? But it turns out to be longer than 2 hours.
I understand it maybe just a bad/unreliable charger, but then I thought of the law. I=V/r. The resistance obviously will stay the same (internal resistance, maybe charger's contacts and whatnot), but the voltage, or rather voltage difference between the charger's output and the battery will go smaller and smaller as the battery is being filled up. In turn, it should cause the passing current to go smaller and smaller too. So maybe it's going full 1A until say 60%, and then the current starts to drop gradually from 1A?
This is all just in my head, and I don't know if it's true or not. Let's assume that it's true, then a charger that's capable to retain full 1A current till full battery should be one that's 'smart' enough to increase the output voltage in according to the increasing battery's voltage. Is there anything like that in the market?
Thanks.
Just need your thought on what just came to my mind about battery chargers. So I'm using a regular charger, right. It's rated at 1A, 4.2V output. I'm noticing that the time it took to charge a 50% battery is longer than what it should, compared to charging an empty one (I know it's not completely empty, but empty according to my mod). For example, say the time to charge an empty one is 4 hours, then the time to charge a 50% one should be around 2 hours? But it turns out to be longer than 2 hours.
I understand it maybe just a bad/unreliable charger, but then I thought of the law. I=V/r. The resistance obviously will stay the same (internal resistance, maybe charger's contacts and whatnot), but the voltage, or rather voltage difference between the charger's output and the battery will go smaller and smaller as the battery is being filled up. In turn, it should cause the passing current to go smaller and smaller too. So maybe it's going full 1A until say 60%, and then the current starts to drop gradually from 1A?
This is all just in my head, and I don't know if it's true or not. Let's assume that it's true, then a charger that's capable to retain full 1A current till full battery should be one that's 'smart' enough to increase the output voltage in according to the increasing battery's voltage. Is there anything like that in the market?
Thanks.
