So if this item is FULLY charged, how many times could I charge my Galaxy S4 (from empty)? How long will it last (thinking emergency battery backup)
144646
Hi, B. Thanks for your question. If both products are in good working condition, the Gridder One should charge your S4 about two and a half times. If you store the battery without any cables or devices attached, it will retain up to 95% of its charge after six months. We do recommend that you recharge any battery at least once every six months to keep it fit.
1890989
Hi, I just tried charging two Galaxy S4 phones with this device. They are displaying a charging status. What I don't know for sure is what charge current they're drawing. If there's a way to get the phone to tell me that, let me know and I'll check (yeah I could cut the cable and put an ammeter on it, but I'm not quite that curious...).
574552
I don't have an S4, but it will charge an S3 in the sme amount of time as your normal charging through a wall charger. I haven't timed it exactly, but it seems the same if not faster. On one trip, it's charged my phone a couple times and my ipad. All be it, they were low on battery, but not empty. Hope this is helpful.
1843652
Yes just make sure you keep it charged. With a full charge it will charges your phone 3 or 4 times.
84333
If you are asking how long your PHONE or other item will stay charged, after charging....then I charged my phone in the AM at camp, and didn't use it much and it still had prob 40% or so when I went to bed. So a normal day's charge for me. The device itself, I've been home 2 weeks, and it still had 1/2 the usage bar full when my husband borrowed it this morning.
1678304
I have found that a full charge will last for 1/2 to 3/4 of an hour if used constantly for the whole time. Also depends on how fast you run it.
1595959
It seems your questions have been answered already. I have the 16000mah version. My wife and I went camping for three days and took this with us. It charged both of our phones (S3 and iphone5) all weekend, and had more than 50% charge when we got back. This 12000mah version has enough power to charge the average phone from dead to 100% 5-6 times minimum. A usb cord that charges a galaxy will also charge this device.
834369
When we first got it ours did the same thing it just needed a full charge, not sure how long that would be because after it kept doing this same thing to me I basically just left it charging for two days. Though it doesn't really seem to have a long battery life to begin with. If that doesn't help I'm not sure, but it does take a long time to charge and without a full charge it goes dead very fast. Hope that helps.
732647
Not sure where I originally got this info, but for years I've sworn by a complete first charge followed by a complete discharge, followed by another complete second charge (and keeping the machine turned off during at least the first exercise). All future use minimizing actual battery usage, so basically keep it plugged in whenever possible or at least charging every night. My 3 yr old LG cell phone still gets 3-4 days/charge (vs 5-6 days brand new) and 4 yr old laptop gets 2 hrs (vs 4 hrs brand new)...Hope this helps.
1021462
Well the other day my phone (S4) was dead. I put it for charging and drove for about 30 mins from my work to home. By the time I reached home it was about 50-60% charged. I drive an infinity, which has a 12V charging plug. At that rate, am guessing an 45 mins to an hour.
179740
I used the charger that came with my samsung s4 mini... i got charged. By the way, two airplane trips allready... over 28 hrs working... no recharges.
514343
Yes I bought this for my s4. It can charge it from 10-100% and still have 25% charging power left. It definitely does not charge as fast as your wall charger but it will do the job. I highly recommend this product! Easily stored in a backpack or bag. 8 out of 10
986661
To be honest. I charged my phone once... only because it's my boyfriend's and he owns a galaxy but he can get 4 full charges before he recharges the Jackery. But I am sure you can do 4 or 6 charges... because it charged my iPhone 5 pretty fast.
165505
I am not really sure, i have a total of 3 batteries, so when/if one goes dead, i just pop it in the charger and it stays till i need it again. My android phone takes a while to charge, even on its own w/o any apps running. My guess it takes about 3 hours from completely dead to charge.
1627980
If this is about the portable charger, ( amazon send me an email ) I have fully charged it and kept it in my car for two weeks before using it to recharge my samsung phone and it not only fully charged it once, but I was able to fully recharge my phone a second time the next day from the same unit. The first time I had neglected to recharge my phone and the battery gave out. The 2nd time from a very low state to full charge in about an hour.
696604
Yep...I've had 3 S3's charging at the same time. I've had this product for over a year now with no issues at all. We don't travel without it.
1335996
It should I used in on a s4 for a few weeks. However it's a tricky charger. If you plug it in to charge the external battery it won't charge the phone as well. So you have to charge them separately. It's not a real big deal but it can be frustrating if you're in a hurry to be somewhere and your phones dead. It's a great way to have a backup battery in your bag or something but I wouldn't recommend leaving it on the phone all the time.