I've used other portable chargers before, but I was looking for some new ones for my recent trip, as I needed to replace my old ones. For context of what I had before, I had two HYPE portable chargers, one was 4,400mAh (Still somewhat works) and the other was 1,000mAh (which no longer works). I also figured it was time for an upgrade.
I went searching on Amazon and came across these two portable chargers, with an really reasonable price for the capacities they have. So order I did and it came next day.
First things I did when I got them, I put them on the charger before I used them. You'll know when they're full when all four lights are solid while plugged into the charger. One thing to note, they weren't kidding when it can take up to 5 hours (or a little more in my case) to charge one of these using an 5V/2A charger. If you don't have an 5V/2A Charger and have a 5V/1A charger (I believe most phones still come with these), it will take a while.
Upon using these, I did notice a few things: - The four lights will stay on if you are charging a device. Nothing extreme, but may be somewhat unnecessary. Will blink with one light when they are low.
- They will warm up a little bit next to the USB ports if the connection is not that great, or if you are trying to pull a decent amount of current. I did have a cable or two that did not have a good connection and this occured.
- One short Micro USB cable that came with these (out of the two cables) came bad (Intermittent connection), but it's nothing to worry about as the other short cable worked just fine.
- The white one to be more specific didn't last as long on the first full charge it had, but lasted really decently the second time it was used.
- If they didn't last as long the first time, make sure it's nearly empty, with one light blinking if you are trying to use it, and let it charge completely again. I actually got near capacity on the white one the second time, charging only my phone (which has a 3,000mAh battery) from 30% three times, with some energy to spare for maybe one more full charge for a smaller device.
- Miady had put on the little paper that you recieve for the chargers that "the output efficiency of each unit is 80%-90%, approximately 10%-20% of the battery capacity is unable to be used because of power consumption of circuit heat, conversions from the battery, the charging cable, etc. Actual charging efficency may differ depending on your charging behavior." Keep this in mind with these portable chargers and with others as well. (Figured I'd mention this here because others may not even read the little paper-book thing that comes with these.)
Overall, these portable chargers are really worth it, and I recommend them for the price they are. You can't just say no to two 10,000mAh portable chargers for basically $20.