This just 'worked' today after being installed for 6 weeks. We had a minor 5 minute power outage but kept the network connections as if nothing happened. Accepts up to 3 amps, exactly the maximum rating of my equipment.As another reviewer mentioned, you probably want to grab a pack of DC adapter tips.

I use this to power a TC Helicon voice live play acoustic the effects processor when I am busking. It is compact, lightweight and it makes it possible to do several sessions before recharging.

I use this in my gun safe to power a led strip light, it's also connected to a motion sensor so it goes off after a short period of time. It has a good capacity and I don't have to charge it up very often, I also like that it has led indicators so I know how much battery is left.

Bought as battery pack for led lights. Works, but doesn’t hold a charge long. Came with splitter to led lights. Might be difficult to grasp how to use for some users.

If you have a Spectra S2, this is essential! I haven't used my wall plug for my spectra since I bought this. I charge it every other day, and it has never gone below 3/5 power dots. My spectra hasn't lost any suction by using this.

It stopped charging after less than three months of use. It was so perfect for my spectra and made it mobile but stopped charging… I feel like it should last longer than three months….

I bought this battery pack to hack my Spectra S2 breast pump. I wanted to be able to move it around without being attached to the wall especially in the car.It holds a long charge! Definitely going to keep this in my pump bag from now on.

I've had this for several weeks now and it works perfectly for the Spectra S2 to allow you to move freely with the pump. I charge it once a day but I'm sure you could go days without charging if needed. I'm also not sure why other reviews say you need a separate connector - just plug the other end of the included cord in (see attached picture).

Not a bad piece. I use it for ghost-hunting equipment. I DO however think it's silly that you have to turn the power to "on", just to open it to charging.

So I use this rechargeable battery for my spectra s2 pump. I have noticed that once it gets down to 2/3bars the suction power gets weaker. But overall it is great to have and I love being cordless. Maybe go with the next power version up.

Bought it to make my spectra s2 breastpump portable. Much better value than paying the upgrade fee to insurance for the s1. I bought heavy duty Velcro and attached it to the bottom of my pump. It works really well! I have to agree with someone else who mentioned you do notice your pump’s suction decreases a little if your battery life is low (but I didn’t take note of how low it was at the time). I like to leave it charging overnight so I don’t have to be plugged in during the day. I haven’t…

I used these for my OLDSCHOOL BOOMBOX battery upgrade’s and man does the battery last! I used my BOOMBOX for 6 day’s and still had 1 bar battery life, for my application it worked great!

This worked awesome for travel. My plug in cords were being awful. But had even better suction with my spectra pump with this so I used it the whole time traveling.

The basic battery is good, but the connection options are limited. I used this to replace the standard 12V brick transformer on some LED display lights, but needed to rearrange the wiring to make the connections. Simply bullet or spade connectors would work better and are much more easily modified.

I am an amateur radio operator and bought this to run my radios while operating portable. I work Morse code with low power, 5 watts or less, and this battery runs my Mountain Topper radio for hours without recharging. And it does almost as well on my KX3. Highly recommended.

I used this as a portable battery for my Spectra S2 breast pump. It worked great! The charge would last for at least 4-5 30 minute pumping sessions. Loved this cheap way to make my pump portable.

Unit works as advertised. Im not quite sure what the forked cable is for, possibly for using and charging the unit at the same time. Perhaps as a battery backup for an AC system.Note:I read another reviewers suggestion that the LEDs could be disabled but it seems they are soldered onto the edge of the main circuit board, so there are no little wires to just cut

This product has been a life saver. I actually use this with my breast pump. Ladies- if you have a breast pump that requires you to be pulled into a wall, get this! It is so nice to be more mobile and just nice to not have to make sure I am sitting right next to an outlet. I also can pump in the car! GAME CHANGER. The battery life lasts forever. BUY IT!

As an engineer, the first thing to do is open it up and take a look. What I found was a decently built product with large cells. A rather complex circuit board to control the charging. You can leave the charger and your device connected for a backup power configuration. The magic behind the device is that the DC power plug module outputs 12.6 volts which is just high enough to charge the batteries without providing excess voltage to your devices. The charged unit itself output 12.48 volts with…

I bought this about 6 months ago for my breast pump. It’s been great but the last couple of weeks I can see I clear decline in battery life and power.I use it 8 times a day for 30 minutes each so I’ve got my money’s worth but unfortunately I have to get a new one to get through the rest of my pumping journey.