This product is very helpful and useful for those who's battery dies fast this product recharges the battery this kind product has made my experience easier and also i can take the product by traveling with whenever and wherever i travel this is a great product i recommend whoever's battery dies and you have to buy the battery again with expensive cost this is a awesome product so anyone can afford it and use it wherever and whenever you want great product definitely recommended wonderful product money saving product i am glad that i bought this product

My old external charger broke the electrical prongs just snapped right off. I could see that it could happen again with this one too so I'm being careful. But I have no problems using this you just have to look at the connectors on the battery when you're sliding it on to make sure it lines up with the connectors on the charger once you do that and plug it in it charges with no problem.

This thing is so compact :o it was amazing how small the package was when i got it. So the first thing i did when i opened it was to figure out how to check my battery status without plugging it because according to another reviewer you could, so the battery i had sitting at home for a while was coming up at 0%. By the way the battery setup was easy because it has to movable metal pins you could adjust to the negative and positive on your phone and what holds the battery is a plastic part that seems like it has a spring to push your phone battery to stay put. I was excited so i plugged in my extra phone battery and saw the led tell me it was charging and i thought it was pretty cool. What i didn't like about the charger is that it seems to charge pretty slow and didn't charge the battery all the way after leaving it for 3 to 4 hours while i was at work, when i came home and checked it it was at 100% according to the led but when i placed it in my phone it read 97% so not sure what happened

I ordered three chargers before I got one that worked with my oversize Perfine battery for my LG V20. The best pat about having a phone with replaceable batteries is that you can carry spares, but it's sometimes useful to have a large spare that will last 2 days, like for long travel days where you use your phone a lot. It's also a bonus if you're with someone who also has a replaceable battery phone of a different type.

EDIT: Forgot to mention a nice feature I have not seen mentioned. It's also a battery tester. Even when not plugged in, it will tell you the battery level when you mount a battery to it. It's a nice feature when you have lots of batteries, and are not sure which are charged and which are depleted.

EDIT #2: Needed to take away one star. I just noticed that it does not top off the battery. I get more like a 95% charge.than a 100%. It also charges very slowly (like 12 hours or more!) . I could deal with the slow charging, since I usually switch batteries in the morning, and 24 hours is enough to finish a charge cycle, but the unfinished charge is not good.

Some may think this can actually be a good thing to preserve battery lifetime, because the battery does not get hot when charged slowly, and not topped off. However, spare batteries are relatively cheap. I'd rather have my battery fully charged, and replace it when it starts to fail. It seems others are in agreement with this issue, and have taken away more stars due to these shortcomings.

Still, it's the only external charger that works on my large extra capacity battery for my LG V20 phone. It can also charge other batteries for cameras, etc. I will still find it useful. At least it's not terribly expensive.

Would have given 5 stars because the product does do what it says it will do, but it takes a long time for my cell phone battery to charge with this device.