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I bought this along with some Enloop AA and AAA batteries for my flashlights and wireless keyboard/trackball. Later I picked up some Anvow AAAA batteries for my tablet pen.
The AA and AAA batteries seem to be working great - charge them overnight and they last for weeks of use in the wireless stuff. I bought the rechargeable for the flashlight as it seems to eat batteries. The AAs seem to last about as long as the alkalines I was buying.
The AAAAs on the other had - it charges them, but when I put them in the pen, I get stuttering and very quickly start getting Low Battery messages on the tablet. Something I noticed; is when the charger says the AAAA is full charged, if I take it out, then put it back, the charger says it needs more charging. So I'm not sure it's charging those fully and I don't know why. Since they're a different brand, that could be the issue.
Either this thing doesn't work according to the instructions, or it is wired backward. I purchased to charge 3.7v Lithium-Ion cells. When a cell is placed according to the instructions with the (+) closest to the digital display, the status image is simply an empty battery. If left in the charger for hours, nothing happened. No status change. Placing the batteries in a known-good flashlight=Dead as a hammer.
Now, if I place the cells in the charger the WRONG WAY with (-) closest to the display and in clear opposition to the diagram and the instruction set, the display lights up and shows me voltage. I DO NOT receive the ERR status that the instructions say I should get for doing it wrong. As it appears to be wired backward, I left the cells in and tried to let them charge overnight.
Guess what? No worky.
I think this one is going to see the inside of the Amazon return warehouse and I'll try another brand.
I have several accessories that use the 18650 battery and they charge either by built in charger or they had a single battery charger come with them. This charger allows me to charge 2 batteries at the same time plus it tells me how much charge is in the battery and how many amps the battery is being charged with. As an added bonus, it charges more quickly than the built in charger. While it is not heavy, by holding in it, you can "feel" and see that it is made well. I like that the power cable is detachable and the LED status screen is bright and very easy to read and understand the functions. Also, it doesn't get hot to the touch while charging batteries. That's a good thing. Overall, this is a pretty good piece of gear that works well for what it's supposed to do.
This is my second review of this charger: I thought so highly of it that after a couple of days I bought another for my Brother-in-law. He also has a few 18650's and informed me how impressed he was with its steady charging, from evening thru the night. I just wanted to say that my flahlights seem to shine brighter than before with an Eastshine S2 and with longer life, as well. I am keeping an eye on it, though, for this old dog has been bitten more than a few times by ptoduct that fails. If the S2 lets me down, I'll be back but right now I'm a solid believer.
I love it. I love that it doesn't require me to dedicate a whole power socket to it, cause the plug is part of the unit. It comes with a cord which is pretty long, so I can plug it in and have it sitting on my desk. It detects the battery you put in immediately and the voltages, and starts charging at 500 or 1000. I charge everything at 500, which is slow, but if I need to double the speed I just set it to 1000. It's still slow compared to like the 2.0a (2000) and such a USB cord may provide, but that's the point of it. Want a fast speed charger, then you can probably just use the device the battery is in. Does what it is supposed to and I love it.
Great product! Worked on a lithium battery not mentioned on the list so I was weary it would work for me but it did. I would say it’s a versatile product and it’s charging power is substantial. Charged my battery’s in about an hour and a half from nearly dead. I’m no electricity expert but Nothing started smoking so I’d give it good safety features. 👍
I've had this charger for about 3 and 1/2 months and use it 2 or 3 times a week to charge my flashlight I use for work. It charges my battery better the the internal charger on the flash light. I'm very happy with this charger and it's the best charger I've ever owned. Very smart charger.
This charger works equally well with different sizes of chargeable batteries. I like the versatility of this charger as well as the speed. It seems to be faster than another battery charger I have that works for only one size battery. It seems to be of good quality.