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Tenergy 9V Battery Charger TN346 Review

They say that necessity is the mother of all invention.  All I can say is that for the last few years I have been talking with battery charger manufacturers about the need for a higher capacity 9V Battery charger that could handle multiple chemistries – both NiMH and Li-Ion rechargeable batteries.

Finally somebody listened. The Tenergy Corp has just introduced an inexpensive, 6-bay 9V battery charger that will handle both NiMH and Li-Ion cells.  We had the opportunity to perform a “hands-on” product review of the Tenergy TN346 battery charger and see how it stood up to  the charging of Ansmann NiMH 9V cells as well as  HiTech and Tenergy Li-Ion Cells.  Take a few minutes to watch the product review.

We found the charger to perform well with both chemistries. The Ansmann NiMh’s charged up to capacity on the first charge.  Both the HiTech and Tenergy Li-Ion’s required 2 or 3 intital charge cycles to bring them up to full capacity. (This is typical of new batteries, particularly Li-Ion chemistry)

As to the batteries, the “new kid on the block” the Tenergy li-Ion 9V, (rated at 500 mah,)  we found the true capacity to be closer to 350 mah  (it’s stated minimum capacity.)

The best feature of the this new charger is when you have different devices that require a variety of run-times. You can opt for the higher capacity 9V’s in Li-Ion and still use it to charge the NiMH cells of lower capacity.

An example of this would be wireless mics or in-ear monitors. Suppose you have a few units that are real power hungry and require runtimes in excess of 4 hours. You could use a Li-Ion battery and get up to 15 hours and still use the NiMH cells for your shorter run time devices.  NiMH have higher recycles value than Li-Ions so you can still get the most mileage from them and use the high capacity Li-ions for your longer run-times – without the need for separate chargers — and the possibility of charging the wrong cells in the wrong charger.


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15 Responses to “Tenergy 9V Battery Charger TN346 Review”

  1. Luther says:

    This is very good to know and you have done a great job on your article and the video that you put together. I was watching another video today that was made with a computerized voice and it was obvious that is what they used. I thought yours was put together with far more expertise. Thank you again for the information.

  2. William says:

    This was very interesting, I have never seen a 9 volt charger or re-chargeable battery. I guess I haven’t really paid attention to it but I have only ever seen double AA. Thank you for posting this I am glad you did because it has opened up more possibilities to me. I assume now that they also have “C and “D size that are rechargeable as well.

  3. Lena says:

    I really enjoyed this video. I don’t have a need for 9 volt rechargeable batteries, but I do have a great need for AA batteries. I just wish (recommend) that the site personnel would publish more video which demonstrate the actual products the same way this video displayed the 9 volt battery recharger. This actually helps buyers like me to make a purchase because seeing the actual product gives me a sense of buying confidence.

  4. Nick says:

    I have a clock radio that runs on 8 “C size batteries so I was thinking of getting some of the rechargeable ones because in the long run we would be ahead anyway on cost. How long is the life of a “C sized battery when it is running all the time? Thank you for showing us this 9 volt charge as well that is going to be a huge help.

  5. Maria says:

    I have rechargeable batteries for almost everything in the house except major appliances and things that really are important. I just recently ran some batteries completely dead before charging them and now they only hold like half as much as they used to. Do I need to get new batteries or a new charger?

  6. Joseph says:

    Rechargeable batteries are the thing of the future and present. These things have been growing by leaps and bounds and it never amazes me the changes they make to them because the technology for them is just amazing and it continues to grow. Thank you for the article it was full of information and I appreciate the information.

  7. Misty says:

    Apple has applied for two hydrogen fuel cell patents. Citing consumer awareness about fossil fuel’s environmental and political impact, the move indicates the company has been looking into a new system to recharge their portable device batteries for over a year. I wonder what this means and what they are up to for the future. I could conjure up some wild, sinister theories, but I will refrain from my conspiracy theories and instead, ask the readers.

  8. Dennis says:

    This is great, the fact that it can handle both NiMH and Li-Ion makes this a perfect battery charger. From the video it sounds like you like it and were impressed. The new kid on the block doesn’t sound very impressive though due to the capacity being the minimum only. I hope that you will continue to keep us updated with any changes or advances.

  9. Judy says:

    I was watching your video and found it very interesting. I have enjoyed all of your articles on batteries and rechargers because I had no idea there was so much to know. It amazes me the technology that is available now that could literally keep you powered up for years. Thanks again for all your hard work that you have put into each post.

  10. Steve says:

    I had no idea that Apple had applied for Hydrogen Fuel Cell patents and I am like Misty in wondering what they are up to. I am not a theorist by any means so I am not going to begin to speculate what they are doing but it would be nice if they would speak up and inform the people of their intentions. Thank you Misty for posting your comment.

  11. James says:

    What does Apple applying for a Hydrogen Fuel Cell patent have to do with rechargeable batteries I mean if it does have something to do with it then I am like Misty in wondering what they are up to. Thank you Misty for posting your comment and concerns I hope that someone will tell us the scoop soon.

  12. Georgette says:

    I am glad that finally someone is using their head when it comes to chargers. There needs to be one though that can handle not only two different kinds of material but also different sizes of batteries. I need one that will hold 9 volt and double A. This is definitely a step in the right direction and I hope that they will continue to make progress like this.

  13. Jimmy says:

    This about the third or fourth post you have had isn’t it? I think I have read most of them and you always have such great information. I am thinking though that this is probably the most helpful one you have posted. I can’t wait to see what they come up with next either. You have done a great job and I hope that you will keep up the good work.

  14. Cory says:

    What happened to Maria’s rechargeable batteries is confusing to me because I always thought that completely draining older rechargeable batteries was good for maintaining their life. Yet her batteries lost their life after she drained them. Did those batteries just happen to die out coincidentally after she drained them or is she just the victim of cheap, unreliable rechargables? Sounds like it would be much easier to just buy annsmen rechargables and a corresponding recharger.

  15. Charles says:

    The patent applications by Apple indicate the company is developing a hydrogen fuel cell system to complement the rechargeable batteries in a “portable computing device” – which could refer to Apple’s range of mobile iDevices, its MacBook range of notebooks. The technology could power portable electronic devices for days or even weeks, which would be sure to silence critics and users who have long complained about the poor battery life of all mobile computing devices.

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