EBL 9V Li-ion Rechargeable Batteries (2PC) and Smart 9V Battery Charger

I picked these up for my TENS devices. I was sick of running through 9 volt batteries while trying to keep up with TENS therapy schedules. It's already hard enough to keep motivation going for long term stuff, and buying batteries was quickly becoming an unwelcome chore. After some poking around on Amazon these seemed like the way to go. And sure enough they perform perfectly. They charge fast. They quite frankly last longer than standard 9 volts in my TENS units. I am thoroughly satisfied with this purchase.If I had to nitpick I would say they're a tight fit. They're like the tiniest millimeter larger than a standard 9 volt. So fitting them in can be tight and removing them a little more annoying. On this note, the shrink wrapped plastic label will eventually take damage I imagine. Not that I'll forget what they are or anything. But it's mostly a non-issue in my situation. I just gotta make sure the pull ribbon is situated well.Long story short; I had a specific use. These work perfectly for it. In fact, they exceeded my expectations. I feel like I already got my money's worth out of them with the amount of cycles I've done. If they died tomorrow, I'd be disappointed but probably buy them again. Of course I have no reason to think they'll run out of juice any time remotely soon. Already saved me money, and I believe they'll continue to save me lots more.

Purchased this based on other reviews for use on a tens unit. The IF mode drains the battery so you would have to change it out every day.! These rechargeable batteries work great

A few months earlier I had purchased the 4 battery kit that came with a 4 slot charger, and recently needed an additional 2 batteries. Furthermore, I also wanted an additional smaller charger that would take up less space in my bag, thus I purchased this kit. The batteries are the same, thus you get the same benefits of a direct output from 2 3.7V (4.2V full charge) li-ion pouch cells wired in series for an 8.4V output. As with the nature of this setup, you will not reach a true 9V output but since most products that use these batteries can work down to the 6V range, you can still enjoy pretty much all of the capacity these batteries have to offer.Compared to quality alkaline 9V batteries, these have a higher capacity at 600mAh rather than the 450mAh that you would get from expensive premium alkaline 9V batteries, thus if your device can operate down to at least 7V then you will get a longer run time from these batteries.If your device needs a higher voltage where it cannot make full use of the capacity of these batteries, then I recommend looking into 9V rechargeables that use a single 3.7V cell and a DC to DC boost converter. Those will offer a fixed 9V output until the battery is drained to its minimum voltage. While it will mean that your device will not be able to estimate the battery level or warn of a low battery, those will give a longer run time for devices with a higher minimum voltage requirement. The only downside is if the device that needs a higher voltage, also works with any kind of audio capture or analog audio output (that isn’t a basic beep or set of tones), then a DC to DC boost converter will introduce noise into the audio (thus not recommended for any musical instruments, mics, or anything dealing with audio in general).The size of the 9V batteries are within the size limitations of the IEC 9V battery standards, with a height (including the terminals) of 47.9mm, width of 26.14mm, and depth of 16.78mm. In my review I included a diagram detailing the measurements I took with some calipers.One thing to keep in mind is that the operating range of a alkaline 9V battery is 9.5V to 5V, thus if a device has a battery gauge built in and can operate down to 5V then the battery gauge will be completely inaccurate with these rechargeable batteries.Pros:Direct battery output with no DC to DC regulators to introduce line noise into a circuit.More capacity than a quality alkaline 9V battery.No DC to DC switching noise (no DC to DC regulator), thus great for audio equipment.Cons:Lower fully charged voltage of 8.4V compared to a fresh alkaline 9V battery.Devices with a battery gauge that are designed for alkaline battery use will be inaccurate with these batteries. If you need to rely on the battery gauge of a device, then monitor at which point of the battery gauge the device shuts off so that you will know how it correlated to the rechargeable battery.

I'm giving a 4 star review since I am not sure the quality/capacity of these 9v batteries. The charger works well though and the batteries have worked well too. I had to use a slightly larger than advertised power supply to charge both at the same time without any problems but other than that for about a month of ownership, no problems.

Great battery and good seller

I really like my new rechargeable batteries, with just a short charging time they were able to work while the other one was charging. I have other EBL batteries and love them because they are long lasting and recharge pretty quickly

Nice product

My Dad’s lift recliner needed 9V batteries which were rechargeable. I grabbed these on PRIME DAY. They charged up pretty quickly. They fit in the black box of recliner perfectly but seem to be not so great power because, unlike the old batteries, the error code won’t go off for batteries still. I didn’t selecti for Longevity because I have no idea how long they’ll last. Am hoping they’ll do the job to lift the person sitting if the power goes out (which is the purpose of putting batteries in the lift chair. They are 9V as the chair asks for. The recharger looks nice. Need to plug it in to a USB port. I took off one star for battery life because they did seem to drain before we even got them installed after recharging. I’m hoping it’s a fluke and that they’ll work well. Very easy to put in the recharger and to charge, no issues with that. Hoping the error code on the remote control will go off (error code is for batteries). The power cord with black box which holds the batteries is brand new so that isn’t the issue. My Dad will have to try it out and make sure all is good.I think it’s a good value, am believing they’ll work out fine and last.