Abovehill 18650 Mobile Battery Box and Power Bank with LED Light and Battery Indicator,Dual USB and DC Outputs for Apple and Android Phones 6 Batteries(Battery Not Included) Black and White

Fits 6 18659 cells with USB and 12v....9V...6V .....and 3.7 output!!!! And does a solid 2A. Maybe 3 if you really push it. The design isn’t THE BEST....but the practicality of this product is THE BEST! I’m thinking of getting a few of these.Uses:Use as a power supply for my 18650 dedicated charger that shows exact capacity and voltage of the cell.To power any automotive part that needs 12V.Extremely useful to a electrician that needs the main voltage to test equipment.It’s also a 18650 charger.Pairs great with usb solar panels to charge your 18659 for free.Connect via 12v port with small portable mini inverter to power small things that are 120v.Can remove the circuit board and just have as a 18650 battery box and have multiple stacks to make a large battery.The ideas are limitless!

Works great as a 18650 battery storage case and as a USB power bank for iPhones.I suppose you could also say it works well as a 18650 battery charger, too.The separate DC power outlet is a great idea and one of the selling points that got my order. The disappointment is that the voltage regulation for the DC power is poor. I tested the voltage levels with a multimeter. When switching from one voltage level to another, the power regulator only SLOWLY adjusts the voltage level up or down to a new level.Not ideal for any application that requires power levels that are fairly precise.

This DIY Powerbank actually does work as intended. The case itself is cheaply made but good enough for the price. The main reason for selecting this DiY Powerbank from multitude of other powerbanks on the market for me was the advertised ability to be able to do DC-DC boost conversion along with standard USB charging ports which all other powerbanks that are on the market.The idea is excellent but it fell short of execution since the current capabilities of the DC output was far below the specs. The voltage without load seems to meet the specs but as soon as you put some load the voltage drops significantly making the DC output feature pretty much useless. In the end I concluded that using DC output might be useful only for very low power loads less than 250-300mAh. The two USB ports however does give out 5V 2000mAh (Combined) which works as intended for charging Smartphones or tablets.There is one thing that is good, the batteries can be swapped in and out with ease which I like. Actually, you can use this for charging multiple 18650 batteries if you are tight on budget trying to build a 18650 battery charger. For the asking price it does charges 6 18650 batteries in parallel. Granted it takes few hours but it does safely charge the batteries without overheating them. Since the top cover slides easily exposing the 18650 batteries swapping batteries in and out is easy with this powerbank.There are some minor annoyances to be noted. The Green LED battery status indicators are blinding bright and does not stop during the entire duration the device is operating. The flashlight feature is just a novelty good only for emergency light. The case is translucent in some places and the blinding bright LEDs bleed from all the orifices making for a spectacular bleeding light show.Hey! for the price you should not be complaining.. Rating the product with three stars!

Really like this power pack. With 6 3000ma batteries it holds a lot of power.It seems to thin to hold 18650s but it does hold 6 of them so it’s not small.It does have a true 2a USB port so it will charge fast.Its only as good as the batteries you put in it. If you want to know how many times it will charge your device do the math.Im not sure about the dc port.Amazon sells cords with female cig lighter plug so I guess you could run anything you could plug in a lighter.Small inverter?So you could get 120v from it .

Once I put my batteries in I did not have to remove them to charge or discharge... it's a all in one unit ...the unit housing could have been a little bit more durable but hey it works fine for what I needed for just put tape on it to keep it close (warning!!!) Always install batteries correctly

The switch on the side lets you select Off, 3.8, 6, 9, and 12 volts for the DC output. It takes up to six lithium 18650 batteries but even one battery can give an output of 12v because of the boost converter in the device. Has two power-only USB ports and a USB input for charging. Be aware the push button on the top only operates the battery level LEDs and the flashlight LED, it does not turn the output power on or off.