Tenergy T9688 Universal LCD Battery Charger + 8 Pack D Size 10000mAh NiMH Rechargeable Batteries UL Certified

Battery's/ charge work well

this works well with the same brand batteries, also works with the Amazon Basic rechargeable NIMH batteries, the charger has the ability to discharge batteries, for a full recharge

With rising prices on batteries, we were going through a lot of money replacing D-size batteries in six LED flicker flame faux candles that we burn for 5 hours every day. This Tenergy unit and same brand batteries seems to be working well. We are seeing about a month between charges, so that means that, at least when the batteries are new, we are getting 150 hours of use from a charge. We have been through two charge cycles at this point. If we start to realize far fewer hours from the batteries too soon, I will update this review. It does take a surprisingly long time to charge batteries in the charging unit, and you can only charge 4 at a time. So if your application requires fast recharging, you might look at another option.

This set comes with 8 rechargeable batteries. The charger can handle all size batteries besides the D’s it comes with. Tenergy’s customer service is outstanding. I contacted them due to the time it was taking to charge the batteries, I thought it was taking too long. I had set the unit to discharge then recharge batteries which was the cause of the length in time. The batteries came charged which I neglected to verify. Customer service was so patient with me assured me all was well and working as is it should. Using the batteries in camping lanterns and they are working great! Highly recommend this unit.

A great way to save money on batteries

Either this charger is defective, the batteries are defective, or both. I put 4 D size batteries in to charge and 6 hours later they still weren't charged. There was also an electrical burning smell that was coming out of it along with a little smoke. So I unplugged it to let it cool down. After it was cooled down I decided to try again. After another 6 hours the display showed that the batteries were fully charged. I went to take them out, but the batteries were too hot to handle, so I had to use a rag to take them out. I pulled out my temperature gun and the batteries were almost at 150 degrees Fahrenheit. After letting them cool down for a good hour I put one back in to check if it was full and the display showed only one bar and started charging the same batteries again. I did this with the 4 originally fully charged batteries, and when I put them back in the charger showed them all at one bar. So I don't know if the batteries aren't holding a charge or if the charger is faulty and reading wrong. Also, the button for the backlight does not work, and the discharge button also does not work. I couldn't get it to discharge. A dangerous product to leave unattended as the risk of fire is too high.

This system worked quickly to initially charge the batteries, and since I have only had it a short while, I cannot say at this time if the life of the charge was good or not. I am using the batteries in my Ring outdoor lights, and so will know soon if they last the same, less than or longer than regular batteries (which I was having to replace about once a month). The system also did heat up while charging, but that was not an unexpected finding. I have since purchased the Tenergy set of rechargeable AA and AAA batteries, and they also charged quickly. I will say it was a little tricky to get the smaller batteries positioned in the charger, but once I figured out how to do it and make the needed connection, the rest were fine. Right now, I would recommend this product but I will try to write more when I know if the charge life met my expectations.

It does exactly what it is supposed to do, charge rechargeable batteries of every size and looks darn good doing it. It has a nice LED display of each battery as it charges so you know when they are ready to go. It looks nice enough that I keep it on my desk instead of stashing it in a drawer when not being used. The batteries hold charge for a good amount of time as well. This is a keeper.