LIJIANI Battery Charger Case,Portable DIY Power Bank Box with LCD Display 2 USB Output,Micro and Type c Input, Smart Charger for 3.7v Li-ion Rechargeable Battery (Battery Not Included)

Great idea. Multipurpose. Battery charger and a portable battery. Yes, they charge a little slower than some, but you have to give a little. Can't ask for everything. Some people are just spoiled brats if you ask me. It will even pick out the bad batteries. Would definitely recommend.

I have been using this for a few weeks now and find it very useful especially when charging 18650 cells, which is the primary reason i bought it. Although I have been in a pinch a couple of times now and it works as effortlessly as a portable battery bank for recharging my phone and other usb powered devices. My only dislike of it is that i am not 100% sure if it balance charges or not and after seeing some horror stories about imbalanced cells i have not been adventurous enough to put cells with different states of charge in it. But for what it is it works better than i would expect for the price.

This is by no means a heavy duty battery case or charger but is a good bargain for what it does. It allows you to charge 18650 batteries and also act as a battery pack. There is no USB-C which is a bit odd but does support lighting input for charging and micro USB. The display works well as you can see a channel for each battery. If you have some 18650's laying around you want to use as a battery pack or need a charger this is an inexpensive way to go.

I love the innovation of this product. Combining an 18650 charger with a power bank is a great idea. Awesome product for someone like me who saves all the individual cells from their old lithium battery packs. It feels a little cheaply made but for the price and the features you can't complain.

If you have loose 18650 batteries, this item puts them to good use.

I wanted a rechargable power bank with replacable batterys this fills the bill . Unlike built in power banks batterys can be replaced when origional ones are beyond recharging

I have 4 5800 mAh 18650 batteries and took it on a walk while I had Pokemon Go open and the charging wasn't even enough to maintain the battery level. After about an hour my phone had dropped over 10% battery charge and used half the capacity of the power bank. The output showed 0.6A which is very low, might be good for slow charging but not enough to charge your phone while using which is the main reason I bought it. I use 18650 batteries for a lot of things so I thought it would be nice to have multiple devices that are compatible with those batteries.Pros:- Small and compact- 18650 batteries can be swapped out with fresh ones- Can be used with one battery if needed, or less than fourCons:- No USB-C output- Slow charging with low output at 0.6A- Charging doesn't seem efficient and loses a lot of charge quicklyIt needs better charging output, more efficient charging and a USB-C output for more versatility.

This was the perfect solution for the cheap Chinese 18650's laying around. It is all plastic, and just basic construction. It does the job, and is affordable. I like the crisp LED status display. With 4 cheap batteries, I ought to have about 4000 to 6000 mAhr worth of juice.