If I put batteries in an alarm clock then plug it into the wall, where would the primary power be coming from? - Quora
![23a 12v Alarm-remote Dry Alkaline Battery Alarm Key Less Entry Watch Batteries - Buy Dry Batteries,23a 12v Batteries,23a 12v Dry Batteries Product on Alibaba.com 23a 12v Alarm-remote Dry Alkaline Battery Alarm Key Less Entry Watch Batteries - Buy Dry Batteries,23a 12v Batteries,23a 12v Dry Batteries Product on Alibaba.com](https://sc04.alicdn.com/kf/H4274945da9204ec7b227e00ee9e524700.jpg)
23a 12v Alarm-remote Dry Alkaline Battery Alarm Key Less Entry Watch Batteries - Buy Dry Batteries,23a 12v Batteries,23a 12v Dry Batteries Product on Alibaba.com
![Philips 1.5v Lr6 Super Alkaline Aaa Battery Alarm Clock Battery - Buy Alarm Clock Battery,Lr6 Super Alkaline Battery,Philips Super Alkaline Battery Product on Alibaba.com Philips 1.5v Lr6 Super Alkaline Aaa Battery Alarm Clock Battery - Buy Alarm Clock Battery,Lr6 Super Alkaline Battery,Philips Super Alkaline Battery Product on Alibaba.com](https://sc04.alicdn.com/kf/H0e1c07c55183425b8612801a62b73b7aN.jpg)
Philips 1.5v Lr6 Super Alkaline Aaa Battery Alarm Clock Battery - Buy Alarm Clock Battery,Lr6 Super Alkaline Battery,Philips Super Alkaline Battery Product on Alibaba.com
![Amazon.com: UPG Security Alarm System Battery 12V 7.2AH SLA Security Certified-Electronics : Health & Household Amazon.com: UPG Security Alarm System Battery 12V 7.2AH SLA Security Certified-Electronics : Health & Household](https://m.media-amazon.com/images/I/51BmW3ZayEL._AC_SL1000_.jpg)