Adding a battery backup on a 240v ac radio.
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#1 (permalink)      10/5/2021 1:15:16 PM US Central   quote/reply + tips
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philipvdb
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Adding a battery backup on a 240v ac radio.
Our neighbourhood has a power blackout since 5 days. I have a small stereo that runs on 240v AC. Since no electricity, no radio. I'm thinking of adding a battery backup since i have tons of 18650/20700/21700 batteries. I'm not an electronician so any help would be appreciated.

Edited on 10/5/2021 at 11:19 PM. Reason:
We can't agree on everything.
#2 (permalink)      10/6/2021 4:01:30 AM US Central   quote/reply + tips
sheepish
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Do you know what power the radio actually runs on? That is, what does the input mains power get converted to inside the radio?

Alternatively, you could buy an inverter and use some of your batteries to power it.
#3 (permalink)      10/6/2021 4:10:17 AM US Central   quote/reply + tips
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philipvdb
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No, trying to find that but havent yet.
We can't agree on everything.
#4 (permalink)      10/9/2021 8:48:25 AM US Central   quote/reply + tips
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Wylie
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Tongboxin C 862, takes three 18650s.

2 memory card slots, USB in acts as powerbank out, headphone jack, a bunch of preset station memory...

By the time you go 24v inverted to 240v your losses pay for a cheap little 18650 powered radio.

Edit: There are 18650 powered amplified speakers as well.

I bootlegged a 50 amp dual fuel (propane/gasoline) generator into my houses electrical system, manually switched unlike a true UPS system yet it works.

Edited on 10/9/2021 at 9:05 AM. Reason:
Always keep your ear to the ground!