Bests & Worsts Reviews from Amazon

** please read entire review! ** Don't know why, but I'm crazy about having portable power that can serve multiple functions. I also have two of the omnicharge 20 plus batteries as well, the only difference between this unit and those is this does not offer wireless charging which is really not an issue anyway more of a convenience. This unit, to me, is better because it has many options for input and output, and a MASSIVE capacity!! This to me makes it one of the better options available at a fraction of the price of what you would pay for an omnicharge unit of any size! First, read the manual! Read the manual! Read the manual! The very first thing it tells you before you use this unit is to charge it to full capacity. I have 18650, 21700, and 26650 lithium ion cells for my hobbies, and when you keep, use, and store these types of batteries there are certain protocol that need to be observed to get the maximum life and performance out of these batteries. This unit uses lithium ion cells, lithium ion cells go through a break in process, whereas when you charge and discharge them the battery's capacity will increase to its full potential over the first couple uses. If you intend to store lithium ion cells and not use them, you want to keep their charge at around 50% which is around 3.7 volts. If this is going to be a unit you use frequently, keep it fully charged. If you intend to store it for a year or more, I honestly would deplete it to around 60% before storing it. Second, the input and output features. This portable battery offers options for both input and output. I use a ts100 portable soldering iron frequently, and it runs off of approximately 19 volts DC. The AC power supply I can use with that soldering iron is compatible with this battery as well as it puts out 18 volts at 2 amps. Conversely, I can use this battery to power my soldering iron as it puts out up 120 volts through the AC outlet. The type C power delivery socket puts out up to 45 Watts which is also very useful for compatible devices. **UPDATE 1/11/20** an additional feature that I like about this unit is that the DC connectors are standard 5.5 by 2.1 connectors, which serve as an output AND an input for charging. Other portable batteries like rockpals and jackery have proprietary connectors for the DC charging of those units which is confusing and inconvenient because you have to have THEIR accessories to charge and use the unit. This one uses standard connectors so you can use anything that is compatible to charge this unit.