Hi!
I just made an interesting thing: used a roller battery and hooked it up with cheap desktop speakers. So now I have a portable speaker, if I calculated right then I have a portable 10W audio system
But I'm worried about the battery, the battery was dead before I added electrolyte to cells, now I get 12.8V and 8.3A with my multimeter.
So how could I know when the battery is, for example, half-charged etc? I thought to buy a cheap ammeter and hook it to the battery, but I can't leave it there the whole time, because even with my multimeter the wires got hot.
Is there a small device or circuit board that would indicate how much the battery is charged? (not needed to be digital, could be just few LEDs).
I just made an interesting thing: used a roller battery and hooked it up with cheap desktop speakers. So now I have a portable speaker, if I calculated right then I have a portable 10W audio system
But I'm worried about the battery, the battery was dead before I added electrolyte to cells, now I get 12.8V and 8.3A with my multimeter.
So how could I know when the battery is, for example, half-charged etc? I thought to buy a cheap ammeter and hook it to the battery, but I can't leave it there the whole time, because even with my multimeter the wires got hot.
Is there a small device or circuit board that would indicate how much the battery is charged? (not needed to be digital, could be just few LEDs).