TenergyT9688 LCD AA/AAA/C/D/9V NiMH/NiCd Battery Charger + Premium 32-Cell 1.2V NiMH Rechargeable Battery 12AA/12AAA/4C/4D Batteries

Reviewing Tenergy T9688 (4 slot D-C-AA-AAA and does AAAA as well)Purchased 08 Feb 2023All slots hold officially supported battery sizes tightly. (I have also used it for my tiny quad-A batteries and they work also.)I probably should give it 5 stars but sometimes I think people tend not to believe a review if 5 stars are awarded by a user.Charge time is moderate which is just what Tenergy advertises and it's just what I desire because the batteries last longer when gently charged. The discharge/recharge cycle works fine, too. I have no complaints. It's rock solid just like my other Tenergy charger.I also have a Tenergy TN162 8-slot AA charger since Juy 2021. It works fine all this time. No problems.The 4 slot T9688 has a 500 milliamp USB port. It's not worth much because practicalliy nothing functions on that little bit of power these days. The USB port only works when the charger is not charging batteries. I have a low draw USB lamp that uses 100 milliamperes. I plugged it into the USB port just for fun. The light plugged into the USB port comes on. If you then charge batteries, the light goes off...until the battery charging process finishes then the USB port is automatically re-energized and my lamp comes on again. So, the USB port could be used to light a lamp to let you know it's done charging. Or, maybe Arduino or Raspberry Pi users would want to use that port to trigger something fun when the battery charge process is done--like send an emaill or activate a buzzer?I don't know what else to say. The Tenergy chargers just do what they are supposed to do and they feel substantially weighted like high-quality materials probably comprise the devices. I plan to get another 4-slot Tenergy so I'll have 2 of the 4-slot models because my aged Vanson BC1HU 4-slot chargers are getting very old and smelling of phenolic overheat...so the young strong Tenergy chargers are ready to step in and take over and keep me powered up. Thank you, Tenergy.

Works great for charging C and D batteries that won’t fit in my AA/AAA only chargers. LCD is cheap and nasty with a bad viewing angle, but that’s only a mild annoyance.

Recharged a dozen batteries within a day so this thing works excellent Boy

The battery charger was deliverred and I took the time to read the instructions, although one did not have to.Batteries charge quickly, but only 4 AA can be charged at one time; the openings are large enough to fit a D size battery, giving the impression that one can piggyback the batteries on one another...no can do.One can't go wrong with the price, however.

As compared to my harbor freight charger, these tell me how full the battery is before it starts charging, and supposedly if the battery is bad. It charges far faster than the harbor freight model, at about 75% of the size, and it's a lot lighter. Even reads "charging" or "full" in addition to showing you how far into charging they are. Others have reported the batteries didn't charge completely, so maybe I'll be back to edit my review. Someone else said they had a problem after 6 months, and showed a corroded connector. I'd really like to know more about where they charged those batteries. Like, did it live in a bathroom that got humid, or in a garage? Not that it should matter, but corrosion on a connector is unusual, and I'm not certain that's the fault of the brand.

I like that I don’t have to have different chargers for different batteries. And with the USB port I can even charge my phone and other similar devivces.

This battery charger has all the features I've always wanted at a midrange price. You can put a different size battery in each bay.AAA battery size in one bay and a AA in the next bay a C battery in the next bay and a size D in the other bay and you will be fine. You will have to wait for the D size battery to discharge before the charge function starts which takes a few hours but you get how independent each bay is... you can also put a different brand of AA battery or AAA battery or what ever size battery you want in the charger.. now I charge all my AAA then charge all my AA then charge all my C batteries ect...ect...I'm just organized like that but you get how mismatched you could be if you had on empty bay and wanted to fill it with some other size.. the 9 volt is the only one that takes up more space than the rest.. the charger also let's you know if a battery is bad or has come to the end of its charging life.. over all this is a good charger for 35 bucks... I recommend this midrange charger.. you can always pay more for more battery capacity or more features or a heavier duty charger build..this charger is made of plastic but with proper handling this charger should last for years before needing to be replaced.... but for my needs this will fit the bill..I give it a 5 star rating

Llevo ya tiempo con el. Carga más rápido que los otros dos cargadores que tengo. Las baterías siguen funcionando muy bien. Lo recomiendo