Arduino 555-Timer Oscillator for Ultra Low-Power Devices Using the Astable Multivibrator circuit with a CMOS 555 Timer, power consumption on battery-powered sensors can be drastically reduced to microamps. This guide demonstrates two common circuits that can be used to achieve this.
Reviews MakerHawk USB 150W Load Tester - Review and Battery-Power Mod I ordered this MakerHawk USB load tester a few months ago. For the price it packs a punch, but comes up short on the accuracy of voltage readings. I modded it to run on a single 18650 Li-ion battery, making it a much more portable and easy to use tool.
Electronics Upgrading 18650 Lithium Battery Cells on a Dyson V7 Animal Vacuum Guide to replacing Li-ion battery cells on a Dyson V7 Animal Vacuum. I replaced the 6 1850 2000 mAH cells with 3500 mAH LG cells, a 75% increase in capacity.
