Power Bank Portable Charger 2 USB Outputs 24000mAh High Capacity Charge External Battery Pack with LCD Display, Compatible with Smart Phones,Android Phone,Tablet and More

When looking for a battery bank most focus solely on battery capacity. But this capacity that is listed isn't actually what you're going to get out of the battery bank. The mAh rating is based on the 3.7v cells inside of the battery bank itself. But USB uses 5v. A simple equation can be used to convert the 3.7V into 5V.ACTUAL 5V mAh : 3.7 X Advertised mAh / 5For a 24,000mAh powerbank 3.7 x 24,000 / 5=17,760mAhWhy am I including this? Well I used a bluetooth enabled USB digital multi meter that measure how much power a wall plug or battery bank is putting out (such as volts & amps) and it will also record how many mAh's a device that's plugged into the output of the device consumed and how long it was charging for.This battery bank is listed at 24,000 mAh(in which we just converted to 5v mAh which is 17,760 mAh,but also does not include any conversion losses) and also states it can charge in only 9 hours.If you look at my includes screen shots and pictures of when I started charging this device when it was completely dead and all the way up to 100% (although when it first showed 100% it wasn't completely charged for another 23 minutes as also seen in included screen shot) you will see the total mAh capacity that this battery bank consumed in order to charge, and how long it took to do so.A lot of companies over rate their battery banks by quite a bit so it never hurts to double check this. The device I used was only $23 for the bluetooth version and a little bit less for non bluetooth.So the theoretical capacity when converting it to 5v from 3.7v is 74% of the capacity (or 26% less)And the actual value I got from charging the device, not discharging keep in mind, averages out to 63.10% of the stated capacity (15,146mAh) and 85.28% of the theoretical capacity. Take this how you will but it's really only useful when comparing to other battery banks to compare their capacity ratings and their conversion efficiency.Also, the "9 hours" stated to fully charge this device is bull. I used 2 different chargers and the one I use for pretty much everything can handle up to 2.5A and supports Quick Charge 2,3 & 4 but this battery bank only sipped on average 6-7W and ended up taking almost 11.5 hours to fully charge.If they want this device to be more competitive, they should make it so it can accept fast charging and use up to 20 watts or so and it would greatly reduce the time to recharge this battery.Overall the device feels quite solid and the screen display is a nice touch and much preferred over led status lights that barely give you a rough idea of the charge level.

Omg .i own couple power bank ,but this one is the best !!!! Design its so nice ,all around its leather ,realy buttifull stuff ,but the most inportant is battery !!! And its the best ,you can charge 2 phones at the time !!! Realy recommend, highly recommend to anyone!!!! Love it !!!

I want a single power bank to replace multiple units for our family when traveling. It has two ports to charge multiple devices simultaneously. It can charge two phones together but only one is a fast charge 2.1A. The other is 1.0A.Five time the battery capacity but only twice of the weight of my other power banks. Very nice LED display for remaining capacity. The casing feel like leather and high class. The price point is very reasonable for it's capacity and compared to similar power banks. The downside of this huge capacity is the charging time of the battery itself witch taking roughly 12 to 20h, but if charging it in advance that's fine. I charge my phone twice and it's still has 66% remaining. It also hold charge quite well when not used. I would update in a few month to see if it degrade over time.

The Ruipu 24000mAh Power Bank is very impressive. It is lightweight, feels durable, has an LCD display that shows the total percentage of battery life left, if it is currently charging and at what AMP, it has one button and three ports; two of which are used to charge devices and one to recharge the battery. It recharges at 5V 2A which is considered fast charging. To turn the battery off, press and hold the button and the screen will go blank when the device is off it does not charge even if it was currently charging. To start charging, plug the USB cable in and it will turn on and start charging, it will also display the volt and AMP it’s charging at. Example. 5V 1A or 5V 2.1A. The port of the left is for regular/slow charring speed at 5V 1A and the port on the right is for a fast charge at 5V 2.1A. At full charge, this battery gives me a full charge on my Samsung Note 8. From 100% the battery depleted 25% which tell me that I could get 3.5 to 4 charge out of a full battery.

Good thing to have. Can charge two phones at once. Nice design, looks like leather.

I bought this unit to partner with a small solar cell for a charging option whilst bikepacking. The battery has surpassed my expectations.The form factor is perfect, a larger than the average smart phone, and relatively light for the amount of charge it holds. I was able to charge my newer smartphone to full battery in only 3 hrs with 78% battery remaining.This has worked well for all USB devices I have tried to charge from it. Would recommend to anyone looking for a big backup option.

This battery pack has given this on the go mom the piece of mind to know that I will never be without "juice" for my phone/ camera. The fact that you can plug in 2 items at once is amazing. It took 10 hours to charge the first time and already had to use it. If you are on the go like I am it is great to have. When my little one is older I know it will be a life saver again for a tablet. The display is large and clearly shows the percentage. I will update the more I use to see how long the battery lasts.

This sucker is heavy. And alot bigger than I expected. I have a Moto G6 phone and this is about an inch taller, 1/2 wider, and almost twice as thick. Bit it has 24000mAh of power. Easy to use. The LED display is a great benifited. I love being able to see how much power I have. I've never had one with a display. So if the size is something you can tolerate, then this will be perfect for you. I can charge my phone atleast 3 times with it. And it will turbo charge. Yay . Has 2 USB ports so I can charge ear buds and phone at the same time.