Tenergy TN141 2 Bay 9V Smart Charger with 4 pcs Centura Low Self-Discharge 9V NiMH Rechargeable Batteries

My wife has a Karaoke Machine and the Cordless Mic's use 9Volt batteries. We were going through quite a few batteries which just seemed like a waste of moneyI ordered this set of Tenergy Rechargeable 9volts with a few back up sets of batteries to keep stored, and we've never had to buy another set of batteriesOnly thing I dont like is when the batt's are on the charger, the charger hums loudly. We just have to plug it into a different room so we dont hear the humThese work great, last a long time and have paid for themselves multiple times alreadyPat Bonish[...]

I knew nothing about this brand and took a chance based on the reviews. Ordinary NiMH 9V retail for about $10 each, so getting 4 and a charger for about $30, inclusive of S&H, is still a good deal, assuming at worst, the battery and charger are like any ordinary NiMH 9V or a simple timer based 9V charger.The packaging and products build quality are first rate, as good as name brands like Energizer or Duracell.ChargerIt not only shuts off based on reaching the final voltage, but has a backup timer to prevent overcharging. Out of box, the batteries top up in < 1 hour, and this was confirmed because I did it 4x, one for each battery. On a depleted battery I had at home it was fully charged in under 2 hours. It does not get hot to touch. It works as described with the LED being RED when charging, and turning green when charge completed. The charger is very small and pocket sized.Battery9V batteries are made of multiple cells in series, it can have 6,7,8 giving a final voltage of 7.5, 8.4 and 9.6Vdc. Cheaper 9V use 6 cells, and the benefit of having more cells is that often devices powered with 9V batteries turn off when it detects low voltage, so more cells mean the battery will last longer in use, even with the same mAH. The end charge voltage of these cells are 9.7V, so one can be sure its anything but a 6 cell 9v.I was skeptical whether these batteries were truly low self discharge. Its been about 1 mo since I charged 3 tenergy batteries and one new standard NiMH 9V together, and after this time, the standard NiMH has self discharged to 8V while these cells are still 9.7V!I've been using one of the tenergy in a multimeter, and surprisingly it still reads full after over a month of use. When used with a 6 cell 9v NiMH it will register 50% in 2 weeks.

One of the battery terminals arrived damaged. Granted, I bought it in "used - like new" condition, and I expect this is why it was originally returned. I was able to fix the terminal with pliers so that the battery can snap on to the charger.Otherwise, works as it should. The Tenergy LSD batteries are great in general.

They charged quite fast. I'm not sure how long it took to charge. I plugged them in, an hour later I checked on them and they were fully charged. They work great & last a lot longer in my medical equipment than Energizer batteries. I like it the charger is travel size. Fits right into my purse or make-up bag.

These 9 volt batteries don't hold a charge as long as non-rechargeables, but given the price of these rechargeable they are well worth the $. I purchased 4 extra of these batteries and keep a rotation for my daily device needs. So far all have held a charge well, and I have no reason to be skeptical of the sellers claim that they can be recharged up to 1000 times. So far, so good.

As described.

I have some digital multi-meters that require a 9 volt battery. The non rechargeable 9 volts i have been buying seem to last a shorter and shorter time. Time to conserve and get the rechargeable 9 volts to cut costs and keep my meters and tech tools working. These seem to do just the job i need. The charger that came with these looks of good quality and has overload/charge protection.

Granted, I use 9v batteries more than the average person. I use a TENS unit to calm the nerve impulses in my back. These are now unable to last more than 20 minutes or so... Though it's showing a full charge. I also have an EBT battery and charger and it's still lasting, and also allows me to crank up the unit. I constantly rotate 9v batteries so this isn't the average situation, but EBT 600mAh Rechargables win in had to head.

Medí el voltaje para verificar sin carga y fio arriba de 9.5 voltios. El cargador muy práctico y compacto.

This 9V rechargeable must have 8x1.2V packaged together as it's multimeter measurement when fully charged shows 9.6V which is exceptional and suggests very good in-use performance can be expected. If it lives up to its 'low discharge' status and advertised long battery life it would certainly be highly recommended.The one downside is that having bought this from an Australian Amazon web site no obvious mention was made that it shipped from the USA and that a plug adapter would be required at additional cost AU$8 - this should be corrected.

When reviewing Amazon.com reviews about this product, the common complaint by nearly everyone was that the male connection on the battery pulled off and could not be reattached making the battery useless. When I received my four batteries and charger, I used a flat screw driver blade to bend the female connections slightly larger on all batteries, charger and devices using these batteries. Now the connections slip on very easily and put very little strain on the battery connections. So far this has worked, and the batteries and charger perform perfectly. The charger has LEDS that change color from red to green when each battery is fully charged. The electric plug on the charger swivels flat for storage or travel. I now note that the supplier I ordered from Vision Store USA is no longer available on Amazon.ca and although the price is the same from the new supplier, the cost of postage has doubled which seems very extreme.Update Nov/15-I have now used these batteries for 5 months and they have all performed perfectly with no problem with the connections pulling loose after I loosened them. I'm so impressed with these batteries, I have now purchased 12 batteries and use them in all my security devices which is saving me a ton of money. I note that they are again available from the Vision store with the reasonable postage charges.

Excelente accesorio, funciona muy bien, las pilas duran mas que las compraba regularmente.

Works great for my smoke alarms.