# USB 5V power from 12v battery **URL:** \ **Category:** Support\ **Created:** [22 February 2021 03:23 UTC](https://forum.core-electronics.com.au/t/usb-5v-power-from-12v-battery/9491 "2021-02-22T03:23:36Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Aaron132323](https://avatars.discourse-cdn.com/v4/letter/a/f19dbf/32.png) [@Aaron132323](https://forum.core-electronics.com.au/u/Aaron132323)\ **Post date:** [22 February 2021 03:23 UTC](https://forum.core-electronics.com.au/t/usb-5v-power-from-12v-battery/9491/1 "2021-02-22T03:23:36Z")
Hi, I’m building a mobile power unit to run LED lights for camping, charge phones/ipads or power my raspberry pi cyberdeck Ive got a 9Ah 12V battery mounted in an ABS ‘lunchbox case’ I’ve added a merit plug socket for 12v power out and for charging i’d like to add 2x 5V usb sockets to charge phones/ipads or my Pi, and need to step down the 12V to 5V would this be a suitable product? or is there something else better suited? > **[Adjustable Switching Power Supply Module IN 4V-35V OUT 1.5V-30V LM2596S...](https://core-electronics.com.au/adjustable-switching-power-supply-module-in-4v-35v-out-1-5v-30v-lm2596s.html)** > > A versatile power supply DC-DC converter module that offers a wide range for both input voltage (4V-35V) and output voltage (1.23V-30V). Tabs on each side allow for the input / output leads to be easily soldered on. Thanks in advance ---
**Author:** ![Oliver](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/oliver/32/3315_2.png) [@Oliver](https://forum.core-electronics.com.au/u/Oliver)\ **Post date:** [22 February 2021 04:46 UTC](https://forum.core-electronics.com.au/t/usb-5v-power-from-12v-battery/9491/2 "2021-02-22T04:46:18Z")
Hi Aaron, Thanks for making a post! Honestly, often the simplest thing to do with 12v Lead Acid batteries is it to add in a cigarette lighter socket and use an off the shelf USB adapter for a car. If you want a neater finish, I’d suggest using something like this: > **[UBEC DC/DC Step-Down (Buck) Converter - 5V @ 3A output](https://core-electronics.com.au/ubec-dc-dc-step-down-buck-converter-5v-at-3a-output.html)** > > Your power supply problems just got SOLVED! This little circuit board may look tiny but inside is a high efficiency DC/DC step-down converter which can output up .. read more Or you could stick the Cigarette adapter inside the box, and wire it outside with a panel mount adapter like this: > **[Snap-In Panel Mount Cable - USB A Extension Cable](https://core-electronics.com.au/snap-in-panel-mount-cable-usb-a-extension-cable.html)** > > This panel mount cable will allow you to enclose a device that has a USB A port. Perfect for placing your project in a secure box. Both ends have standard USB A, .. read more ---
**Author:** ![Bryce](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/bryce/32/3631_2.png) [@Bryce](https://forum.core-electronics.com.au/u/Bryce)\ **Post date:** [22 February 2021 04:51 UTC](https://forum.core-electronics.com.au/t/usb-5v-power-from-12v-battery/9491/3 "2021-02-22T04:51:28Z")
Hi Aaron, Welcome to the forum! 🥳 Excellent question, as long as the draw from all the parts that you’re using is below 3A total, then you should be able to use this converter after you’ve adjusted it to the appropriate 5V out before hooking it up. The LED strip should have a current rating per metre that you can use, and your iPad/Phone should also have a rated charging current that you can use to determine whether or not this would be suitable. That being said, I believe that it would be much simpler to use a 5V battery pack instead, although as the saying goes. Necessity is the mother of… 😁 ---
**Author:** ![Aaron132323](https://avatars.discourse-cdn.com/v4/letter/a/f19dbf/32.png) [@Aaron132323](https://forum.core-electronics.com.au/u/Aaron132323)\ **Post date:** [22 February 2021 23:42 UTC](https://forum.core-electronics.com.au/t/usb-5v-power-from-12v-battery/9491/4 "2021-02-22T23:42:27Z")
Hi Oliver, the USB car adapter is a great idea, i not even thought of anything like that, the space inside the battery box is limited so having all the circuitry/wiring in a unit like that will be perfect appreciate the help ---
**Author:** ![Bryce](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/bryce/32/3631_2.png) [@Bryce](https://forum.core-electronics.com.au/u/Bryce)\ **Post date:** [23 February 2021 04:25 UTC](https://forum.core-electronics.com.au/t/usb-5v-power-from-12v-battery/9491/5 "2021-02-23T04:25:15Z")
All good Aaron, Let us know if there’s anything else that you need. Have a great day!