You might want to check your power numbers. Importantly, using mAh with a mix of voltages is error-prone, you really need to use Wh to measure your capacity and expected consumption. 18650s are typically around 8-12Wh each (multiply nominal voltage by nominal capacity, i.e. 3.7 * mAh rating), so you've got around 30Wh of energy available with 3 of them. If all of your usage was at 5V, you'd have roughly 6000 mAh at that voltage (30 / 5, and that's before losses in converting the voltage up or down).
If your Pi is pulling 1A @ 5V, that's 5W, so your 30Wh of battery capacity would last a little under 6 hours. That's not going to allow you to run it overnight, if that's your consumption. It's unclear to me, exactly what your consumption is, as you've said both 3.8A and 360mAh without specifying a voltage. If you are actually pulling 3.8A @ 5V, that's 19W, so your 3x 18650s are only going to give you something like 90 minutes of runtime.
If your Pi is pulling 1A @ 5V, that's 5W, so your 30Wh of battery capacity would last a little under 6 hours. That's not going to allow you to run it overnight, if that's your consumption. It's unclear to me, exactly what your consumption is, as you've said both 3.8A and 360mAh without specifying a voltage. If you are actually pulling 3.8A @ 5V, that's 19W, so your 3x 18650s are only going to give you something like 90 minutes of runtime.
Statistics: Posted by Murph9000 — Thu Jan 23, 2025 9:20 pm