The Professor reviews the Bluetti EB70 700 watt LiFePO4 solar generator with a 716wh 2500 cycle battery, dual 100w usb pd ...

A previous Design Idea describes an astable multivibrator that gets hysteresis from the positive feedback stage using a technique you can characterize as positive-capacitive feedback (Reference 1). It ...

The Professor reviews the Pecron S1500F 1500w solar generator with a 1461wh 2000 cycle battery, 400w solar input, and 3.5 hour fast charge that's smaller and cheaper than Jackery. Is it the best ...

It seems that no matter how new your smartphone is, battery life is never efficient. After all, when your phone is filled with features and apps, it’s hard to not use them all day long, but strapping ...