How long does it take to charge this in the wall?
576776
In general, you can get an approximate time for charging anything from zero by dividing the mAh rating by 1000 and then dividing that by the amp rating of the charger. So in this case, you get 50,000/1000 = 50, which you then divide by the recommended 2A charger, and you get 25 hours. I'd add about 10% to cover efficiency losses, too. (This also means that using a 1A charger would require over two days to complete a charge.) Those who claim it can be charged in two hours are wrong. You'd need a 25A charger to do that, which don't exist for USB. You'd destroy the batteries anyway.
576777
My experience is that it takes well over a day to charge. I'm also finding that the true capacity is 50-60% of what was advertised.
576778
I just did three charge/discharge cycles on the brand new battery. 0-50% took an average of 10 hours and 50-100% took an average of 15 hours
576779
I can't answer that when it needs a charge I plug it in on my way out of the office for the sorry I cpuldn't be more help
576780
When I initially got the power bank, you have to hold down the power button until it comes on. I plugged it in for about 2 hours, until all the light came on. I was not sure if it came pre charged. It did not come with any instructions, which I did not like. It's not rocket science but still.
576781
The label says input 5 Volt at 1 Amp max, while the battery rated 3.7 Volt at 50,000 mAh. Converted the rated 50,000 mAh @ 3.7V to 5V, you should have 37,000 mAh (3.7/5.0 x 50000). So, when you charge it with 1 Amp @ 5V for this 37,000 mAh, it should take 37 hours from empty to full. If it takes only few hours, I really question the battery rated capacity. Bottomline, the longer it takes, the more capacity it has in the battery.
576782
In general, you can get an approximate time for charging anything from zero by dividing the mAh rating by 1000 and then dividing that by the amp rating of the charger. So in this case, you get 50,000/1000 = 50, which you then divide by the recommended 2A charger, and you get 25 hours. I'd add about 10% to cover efficiency losses, too. (This also means that using a 1A charger would require over two days to complete a charge.)Those who claim it can be charged in two hours are wrong. You'd need a 25A charger to do that, which don't exist for USB. You'd destroy the batteries anyway. In general, you can get an approximate time for charging anything from zero by dividing the mAh rating by 1000 and then dividing that by the amp rating of the charger. So in this case, you get 50,000/1000 = 50, which you then divide by the recommended 2A charger, and you get 25 hours. I'd add about 10% to cover efficiency losses, too. (This also means that using a 1A charger would require over two days to complete a charge.)Those who claim it can be charged in two hours are wrong. You'd need a 25A charger to do that, which don't exist for USB. You'd destroy the batteries anyway.
576783
It took me several days to recharge after draining the power the first time. It is not unusual for these types of power packs to take one to three or four days to fully charge. You have to plan ahead.
576784
A very long time. I would say somewhere around 30 hours. The battery lasts forever though.
1202705
If it is fully drained it takes about 7 hours if hooked up to a computer and 5-6 hours if plugged into the wall. But this charger is AMAZING!! I have a few of them
1814483
It seems to only take a few hours. I plug it in overnight and it's charged in the morning.
721091
Not completely positive, but more than six to eight hours. I find it is not a quick charge at any given time, but your given adequate warning that it needs a charge and can plug it in overnight so it's ready when you do need it.
1425817
Received mine this morning. From a wall, it took, at minimum, 3 hours. The next time I remembered to check if it was fully charged was two hours later, and the LED indicator showed it was fully charged. Other times listed here are likely from an earlier model, that also had different features. The manufacturer should clarify these specifications, since old answers and reviews are misleading current customers.
917498
From zero, takes about 12 hours. When you have about 25% left (which is what I have after a weekend of traveling), 6-8 hours. That is with it hooked up to my PC via USB. Not sure if you plugged it into the wall.
2021363
It depends on your charger. Charging with a Computer USB port it can take up to 5-6 hours and charging with a more powerful Wall Charger it should be around 3 hours.
1140111
I take it on trips. It charges fast off of the wall, about four hours. It takes about four days to charge in my window. I have charged my cell phone many times on bus trips and such for extended life and when camping. I have probably recharged it dozens of times, and used it as many.
1053158
It does both. The battery charges when it's plugged in the wall, and lasts about 4 hours when it's not plugged in.
1425816
Recharge time depended on how I recharged it. Wall charger, 1.5 to 2 hrs was good. From computer or car adapter, full charge took longer.
1333418
I usually plug it in overnight. I think it takes a few hours to charge. It depends on how low the battery is when you charge it.
2100553
The things is rechargeable, I suspect that once it charge it no longer consumes anymore electricity, but if you so frugal that you might save a penny or two over a a week, you could just disconnected from the wall once is charge completely.
518766
It comes with a USB cable. You charge it by plugging into anything that accepts USB, like a PC, or your phone charger. The part that plugs into the wall is not included.
1709816
No. It does not charge all that quickly. Definitely not faster than a wall charger.
2254723
Yes, recharges in 2 to 3 hours with included standard transformer for wall plug-in or by USB plug into your computer
530611
I plug it into my computer or usb capable wall charger. It charges in no time.
594273
I think it takes about 3 hours to charge fully... or at least that's what I always do. I use the speaker part sometimes to hook up my mp3 player, and when I do that I have it plugged in. It is not the best quality for this though.