Uploaded March 2020 | Updated September 2026, 37 minutes ago
The advantage of a telephone landline is that it always works, even on a power outage. That is if you have a stationary device. If you have a cordless phone than it is useless in a situations like that. But with my circuit you can use a cordless phone on a power outages by using power bank. It can also work on a cell phone charger!
The advantage of a telephone landline is that it always works, even on a power outage. That is if you have a stationary device. If you have a cordless phone than it is useless in a situations like that. But with my circuit you can use a cordless phone on a power outages by using power bank. It can also work on a cell phone charger!
