![]() The kit comes with 2 rechargeable 9v batteries and a 9v charger that works with any household outlet. You will no longer need to buy a TENS unit battery for your TENS machine when you purchase this kit. Trust the official TENS 7000 brand to keep your TENS 7000 charged with our rechargeable battery kit. The TENS 7000 has been purchased over 1, 000, 000 times since 2008 and is a trusted friend when it comes to pain relief. Our kit comes complete with a NiMh/NiCd Charger and 2 Rechargeable 9 Volt Batteries ensuring you won't ever have to worry about your TENS 7000 dying. Save time, money, and pain with the TENS 7000 Official Rechargeable 9V Batteries Kit. I will, for sure, be looking for a replacement charger.A dead battery in your TENS 7000 can leave you without treatment. But I have also had multiple times that I put in a "charged" battery and I hit static/maxing out within 15 minutes. Most of the time however, it last through one 2-3 hour day, maybe with a little left over I can use the following singing session. I used them for a few days with 2-3 hours of use per day. With these batteries, I have had twice that they have lived up close to the performance of a regular battery. Around the 10 hour mark, there would be a bit of static and (I don't know the technical terms), but I would be maxing out the mic if singing with any power behind my voice. Around the 8-9 hour mark, I would start noticing the recordings being lower in volume that when the battery was new, but it's still good sound quality and I can adjust the volume it saves at manually so that's not a big deal. That battery life estimate held pretty true with every regular, non-rechargeable battery I've used, and I went back and bought another for comparison purposes after using these rechargeable ones. When used with the iRig's phantom power, estimated battery life for one 9V battery is 10 hours (that info comes straight from the iRig Pre's product page here on Amazon). That particular mic requires the +48V phantom power option with the iRig. I bought this to record on Smule using an iRig Pre, connected to a Blue 200 mic. I have also had a few times that the charger has deemed them fully charged and they are close to dead.Īs I started with, I am undecided on the batteries because it could simply be a charging issue - without a new charger I can't tell. Most of the time they work, but only up to about 50% of the battery life of regular batteries. I can rarely get both charging slots to light up.Īs far as the batteries go.I have had a few times that they perform comparably to the regular, non-rechargeable batteries I've purchased. Sometimes I have to play around with the battery, move it around and keep reconnecting the battery before the charging light comes on.and sometimes I have to walk away and come back later before it will work. Sometimes the charging light will come on right away. That has worked better since gravity isn't trying to pull it from the charging slots, but it's still inconsistent. So, I've opted for plugging it in to a power strip. If I try to attach the batteries prior to plugging the charger into the outlet, no matter how gingerly I do it, the batteries fall off or at least enough out of place during the plug in that they won't charge. When I have this plugged directly into an outlet, its a chore getting the batteries to fit into the right ridges and stay put. The majority of power outlets are vertical on the wall. All of the two-slot chargers I was seeing when looking around on Amazon were of similar design so I hadn't even considered the flaw in this design prior to testing it out. I'll put details down below if anyone cares or is planning to use these for a similar situation so you have a warning, but here are the basics:Ĭharger design is not good. I am giving two stars instead because the batteries typically do work.but they are inconsistent, possibly due to the charger. ![]() Still not quite as good of performance as regular, nonrechargeable batteries but I think that's usually to be expected and the replacement charger made this a very worthwhile set to have on hand. I still have to play with the charger a little bit to get it going (unplugging/replugging it once or twice does the trick) but it charges the batteries much more completely and the batteries don't fall out of the charger the way they did in the original one i receieved. The seller contacted me after my last review and sent me a free replacement charger and it made a VERY significant improvement.
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