4 PCS 4 AA Battery Holder USB Switch, 6V USB Female Socket, 4 x 1.5V AA Battery Case Box Holder On/Off Switch for RC Cars LED Light

Work great. Used to build wireless Arcade sticks.

These units (4 in this kit) convert 4 AA batteries (per unit) into one "USB charger" (that can be used to power/charge your USB powered devices). I don't expect to do this a lot (since I don't like to waste a lot of disposable batteries) but I consider it a nice backup option to have during long "power outages" (or anytime my USB devices are away from a power source).Yes, these devices do require you to have extra AA flashlight batteries to make them work. However, since I've been buying my AA batteries in bulk for years (to keep the cost per battery down), I almost always have a number of "spare" (not yet used) AA batteries around the house. So using those extra AA batteries as a "backup USB charger" seemed sensible to me. And I have already tested using this "charger" around the house, and it worked with my USB powered lights, my USB powered fans, as well as our cell phones (but the cell phones did show it as a "slow charge").NOTE: These "chargers" only work with USB devices that expect the older 5 volt USB power standard, not the higher voltage that some USB-C devices expect. So while these "chargers" will work with most of the USB powered devices I own, it does not work with our 2 laptops (which each require the higher USB-C voltage to power them). Of course, the laptops will continue to run (under their own power) until their rechargeable battery uses up it's stored power.

The cases have small clasps that all four of the units were broken on the side where the wire connects, making the door not seal completely. the usb connectors are misshappen or otherwise not able to be connected because the internal shelf piece common to usb a is either broken or out of tolerance so you can't plug in. 2 of the 4 had wires that were outside of the case holes and the wires were not connected inside the case. I simply threw them all away. It's not even worth the time to send them back. Trash Trash Trash Trash - Do not buy these.

The product works great, good price easily broken if dropped

Works great with some fairy lights I bought that have a USB cord end for my wedding. Thanks so much

I needed to power a bunch of LED lights for a party and didn't want tons of cables and extension cords everywhere, so I grabbed these packs and a bunch of Amazon Basics AA batteries. The packs had no problem powering the lights through the 4 hour party and were super simple to use. Highly recommended!

Only two of the four worked, but that was all I needed so I didn't bother with doing a return. Still worth the money in the long run since 1 costs the same as the 4 pack.

I ordered these to take on a cruise to power some salt string lights and some crystal string lights that we hung in our stateroom around our balcony door with magnetic hooks. I knew we probably wouldn't have access to USB plugs where we would want to hang the lights so this solved the problem perfectly! One set of batteries lasted all 8 nights of the cruise to power these lights all night long every night as soon as it got dark till the morning.

Needed a power block that had a on/off switch for Diecast Model Case with LED light. Bought these battery operated power block with USB connections. I just added a wood bracket to hold the battery unit. Worked out great.

Building a DIY DJ device and this product rocks in pure perfection of 10 stars out of 5!

One of the wires broke and I had to reattach. The others work good.

Excellent product. with the right batteries you can get long lasting AC free display. Ideal for discrete installs where a nice clean wireless option is preferred. Allows you to connect LED strip lighting that has a USB power requirement

Batteries fit well. Electrical contacts seem to be reliable. Comes with a very useful on/off switch. The fitment of the plastic cover is ok but a little loose.