pdh ✭✭

> What is the utility of emitting 2.5/5/7.5/10 volts from a device powered by two 9 volt batteries? The output voltage is not intended to power anything, it's a precise reference voltage that you …

Precision voltage references are inexpensive and can help put your mind at ease... I have this one, which apparently isn't available anymore, but it cost about $15 if I recall correctly: https://www.…

Power (watts) is voltage times current, so a 40-watt load would require about 3.3 amps from a 12-volt battery. Your battery (35 amp-hours, not 35 amps) should be able to deliver 3.3 amps if it's in …

What kind of battery are you using? Your problem could be lack of battery capacity, rather than trouble with the inverter. Side note: I did a quick online search for that pump and the docs I found sa…

I've heard that in general, LiPo batteries should be partially discharged before being stored for a long time. I know that's true for the small ones (not LiFePo4's) because I've got a few drone batte…