Converting battery lights to USB

[Andysmee]

This is a mega lazy way of finding this out, but I know that I'll get a good answer and lots of examples...


What do I need to convert this string of lights from the 3 x 1.5V AA battery holder to a USB @ 5V?

 

[Pete C]

Can you tell if the AA batteries are in series or in parallel ?
Put another way, can you measure the output voltage of the battery pack ?

Pete

 

[paddy26]

Mega lazy solution :

LR6 AA Battery Eliminator USB Power Supply Cable Replace 1-4pcs 1.5V AA Battery 667C - AliExpress 44

Smarter Shopping, Better Living! Aliexpress.com

a.aliexpress.com

 

[Robert]

I would use any USB type A lead.
Cut it and connect power wires straight to your string of lights. I have used dozens of 5V DC power supplies on variety of home gadgets which by design were using 3 x 1.5V AA/AAA batteries.

 

[Andysmee]

Can you tell if the AA batteries are in series or in parallel ?
Put another way, can you measure the output voltage of the battery pack ?

Pete

Yeah, in series 4.5V

Mega lazy solution :

LR6 AA Battery Eliminator USB Power Supply Cable Replace 1-4pcs 1.5V AA Battery 667C - AliExpress 44

Smarter Shopping, Better Living! Aliexpress.com

a.aliexpress.com

That is awesome

I would use any USB type A lead.
Cut it and connect power wires straight to your string of lights. I have used dozens of 5V DC power supplies on variety of home gadgets which by design were using 3 x 1.5V AA/AAA batteries.

See, I told you, awesome answers!

 

[Pete C]

I would use any USB type A lead.
Cut it and connect power wires straight to your string of lights. I have used dozens of 5V DC power supplies on variety of home gadgets which by design were using 3 x 1.5V AA/AAA batteries.

Agreed. A new AA battery puts out about 1.6v.
3 x 1.6v = 4.8v which is close enough to 5v to mean you can just use a standard USB 5v power supply.

Pete

 

[Andysmee]

Done...