My Device needs 750mA Max power output but from the description above I read the output currents of the the battery bank are 1000mA and 2100mA .so how can it works with my device? the higher output current doesn't damage my device? please clarify me the product description. Thanks My Device needs 750mA Max power output but from the description above I read the output currents of the the battery bank are 1000mA and 2100mA .so how can it works with my device? the higher... » Read More My Device needs 750mA Max power output but from the description above I read the output currents of the the battery bank are 1000mA and 2100mA .so how can it works with my device? the higher output current doesn't damage my device? please clarify me the product description. Thanks « Show Less
1551456
The real answer: Nothing to worry about if the current draw of the device is less than the maximum output of the battery. However, if the current draw of the device is GREATER than the battery's maximum output current, you will possibly experience the battery overheating and/or experience a thermal runaway.
1551457
I have used mine on a number of devices, gameboys, PSPs, phones, tablets, mp3 players, it has charged them all without an issues.
1132369
This isn't a car battery with straight wires shoving into your phone like Frankenstein. I don't know what kind of "device" you have but I'm pretty sure it won't have a problem charging with this
1628244
It has more than enough capacity to power your device. I have been using it on a daily basis for over 6 months to power a Nexus 7 tablet and a Verizion Hot Spot in my vehicle with no problems.
242446
Charging voltage i beleive it depends on the QI Charger you are using. As for the output, it is 640mA. Best
663932
Well, although other people have said that "any" input voltage between 3.5V-30V is fine (which is true), there are other things to consider when using the device to avoid damage, such as: the voltage ratio should not exceed 3, in example, means you cannot use 3V to go up to 15V, that will be a voltage ratio of 5. Description says it can supply up to 5A but then it clearly says it can operate at 3A with good ventilation, my personal safe threshold for supplying devices is 50% maximum capacity, so I don't ever use it for more than 2A, this rule of thumb always worked fine for me.
1380483
The built-in microUSB cable is reported to produce 1A output while the USB connection is capable of up to 2A. See: http://www.easyacc.com/power-bank/p98-easyacc-ichoc-m5-5000mah-dual-ports-power-bank.html (scroll down to "Technical Details" near the bottom). I haven't taken a multimeter to the leads to test these claims, but they seem pretty reasonable.
1638105
I believe the charging circuit monitors the voltage and as the voltage reaches the maximum for that type battery the charging stops. The lights turn from red (Charging) to green when fully charged. It is recommended to take the batteries out once charged and use them. If its not a device I have to have I just take the dead batteries out and charge them and put them back in. They charge quite rapidly. If the battery is bad it won't charge them. I love it, especially the dual usb chargers on the front. I can quick charge my phone with the 2 amp or leave it on all night with the 1 amp. Per your question no, I don't believe it will overcharge a battery. I believe the charging circuit monitors the voltage and as the voltage reaches the maximum for that type battery the charging stops. The lights turn from red (Charging) to green when fully charged. It is recommended to take the batteries out once charged and use them. If its not a device I have to have I just take the dead batteries out and charge them and put them back in. They charge quite rapidly. If the battery is bad it won't charge them. I love it, especially the dual usb chargers on the front. I can quick charge my phone with the 2 amp or leave it on all night with the 1 amp. Per... » Read More I believe the charging circuit monitors the voltage and as the voltage reaches the maximum for that type battery the charging stops. The lights turn from red (Charging) to green when fully charged. It is recommended to take the batteries out once charged and use them. If its not a device I have to have I just take the dead batteries out and charge them and put them back in. They charge quite rapidly. If the battery is bad it won't charge them. I love it, especially the dual usb chargers on the front. I can quick charge my phone with the 2 amp or leave it on all night with the 1 amp. Per your question no, I don't believe it will overcharge a battery. « Show Less
1091350
Hello. From my understanding and current tests. The higher capacity device will pull 2A. And the lower end device will pull 1A. I have ordered a USB Meter to see if either USB port is designated solely for 2A. So far. The panels put out great power and I am satisfied. I haw changed an iPhone4, iPad mini no retina, lg android, 12000 Mah newtrent power extreme battery bank, 5200 Mah brightech battery bank, and eneloop rechargeable batteries with the eneloop USB charge adapter. All devices function and chare fine. The phones and tablets will read an error of power soure of the panels are not in direct sunlight. It's an easy fix. Just position the panels on the sun again. I highly recommend a external battery bank. This way you store the unused power. No sense in wasting free juice. Hope this helps.
837958
The panel does not output 5W like the specs and other reviewers suggest. The integrated *battery pack* outputs 5W, but the panel itself seems to only output in the range of 1W to 1.5W.From the specs directly from the manufacturer, the battery is 2200mah, and it takes the panel 10 hours to charge it. If you work the math out, that means it charges 220mah per hour, which would be 220ma of current @ around 5V (maybe slightly higher?), 5v * .22a = 1.1WJust because the unit has the capability to output at 5W, doesn't mean it can collect power from the sun comparable to a 5W panel. The panel does not output 5W like the specs and other reviewers suggest. The integrated *battery pack* outputs 5W, but the panel itself seems to only output in the range of 1W to 1.5W.From the specs directly from the manufacturer, the battery is 2200mah, and it takes the panel 10 hours to charge it. If you work the math out, that means it charges 220mah per hour, which would be 220ma of current @ around 5V (maybe slightly higher?), 5v * .22a = 1.1WJust because the unit has the capability to output at 5W, doesn't mean it can collect power from the sun comparable to a... » Read More The panel does not output 5W like the specs and other reviewers suggest. The integrated *battery pack* outputs 5W, but the panel itself seems to only output in the range of 1W to 1.5W.From the specs directly from the manufacturer, the battery is 2200mah, and it takes the panel 10 hours to charge it. If you work the math out, that means it charges 220mah per hour, which would be 220ma of current @ around 5V (maybe slightly higher?), 5v * .22a = 1.1WJust because the unit has the capability to output at 5W, doesn't mean it can collect power from the sun comparable to a 5W panel. « Show Less
1215504
This is an active device designed to be used within USB spec. Plugging it into a charger will not tell the charger to dump power as that would be a fire hazard, therefore your device will only charge at normal USB current of 500ma, on top of that, the device has a built in amplifier that feeds off of USB power, so the output will be slightly less than 500ma, I would only count on ~350 - 400ma output, which is not enough to charge some devices, especially tablets. Most USB peripherals will work, however some will require extra power.
318273
That depends on the Qi charger you use, most of them max out at 1000Ma equivalent. Some older ones are 500Ma equivalent.
206590
Depends what you're charging from and what kind of power output it has. Remember this is 13000mAh. It's a large battery. If you're charging from the wall try a different wall connector. If you're charging USB you have to consider the amp output of that port. And if you're using solar power you gotta consider output of that as well.
430188
Must be an incorrect photo. The one I received (and I just looked at it) says 500mA on the label. It has been working great now for a long while as the replacement for the one I had to throw out. EDIT: I just looked at the picture. It says 250mA input but the output is indeed 500mA.
1899235
This PortaPow unit does NOT regulate the output to 5V. All it does is to take the combined voltage of 4 cells, and substract a diode drop (~0.6V) from it. So if you are using 1.5Vx4 alkaline cells, the USB output is around 5.4V. But if you are using 1.25Vx4 NiMH cells, then the output is only around 4.4V.
165694
Jesse! It charges the battery or batteries at 12 volts which is the output of your Powermax and it will select perhaps up to 10 amps of charging power. Batteries cannot be beaten to death by charging with extreme amperage.If your rig is at 30 amps you will need a 30 amp breaker at the camp sight or at home. The same holds true for the 50 amp breaker. Normally you will never draw more than 80% of the output value. Therefore be very careful what sized output you choose when you buy a unit. for camping go according to the amperage drawn by you camper or mobile. If you need to draw more, you would be out of spec with everybody else out there. All the best, and happy camping.Antonio Jesse! It charges the battery or batteries at 12 volts which is the output of your Powermax and it will select perhaps up to 10 amps of charging power. Batteries cannot be beaten to death by charging with extreme amperage.If your rig is at 30 amps you will need a 30 amp breaker at the camp sight or at home. The same holds true for the 50 amp breaker. Normally you will never draw more than 80% of the output value. Therefore be very careful what sized output you choose when you buy a unit. for camping go according to the amperage drawn by you camper or mobile. If you need to draw more,... » Read More Jesse! It charges the battery or batteries at 12 volts which is the output of your Powermax and it will select perhaps up to 10 amps of charging power. Batteries cannot be beaten to death by charging with extreme amperage.If your rig is at 30 amps you will need a 30 amp breaker at the camp sight or at home. The same holds true for the 50 amp breaker. Normally you will never draw more than 80% of the output value. Therefore be very careful what sized output you choose when you buy a unit. for camping go according to the amperage drawn by you camper or mobile. If you need to draw more, you would be out of spec with everybody else out there. All the best, and happy camping.Antonio « Show Less
666649
How much current an device draws is dependent on the device but the upper limit depends on the source. If the source can provide up to, say, 5 amps, then something connected to it can draw as much current as it will, up to 5 amps. Phone designers would be crazy to design devices that could create a thermal runaway., especially devices with lithium batteries which can explode if overcharged. For this reason lithium batteries in consumer good have the charging control circuit built into each battery -- this ensures against an overcharge. Re battery life, lithiums are complicated but the short answer is that it's really only the charging when the battery is nearly fully charged that matters. If you charge high current when topping off, it can reduce battery life. But the charging control circuit is supposed to limit the current and approach zero when the battery is full. The source controls the voltage seen by the device (phone or whatever). The USB standard is 5 volts DC-- So that's the voltage presented by any device built to USB standards. Your car, nominally 12 Volts, is really about 13.5 volts or a bit more depending on the design of your car battery and alternator. This can cause a USB device to output slightly above 5 Volts if it was designed to have exactly 12 volts as input. When you start the car a surge can go through that is higher. It's a good idea not to have phones or such plugged when you start up the car.
2153279
The Total output current is limited by the power converter inside. You cannot operate both ports at their maximum output currents. If delivering 3.4A of total output current is important to you, consider the AmazonBasics 10,000mAh Portable External Battery Charger. It is able to produce 3.8A of total output current according to my test.
1173550
The newest generation of iPads and iPhones require a higher output USB standard. Older devices will charge fine using the USB out feature of the Solar Battery Charger. Here is part of a Wikipedia article concerning USB ports and standard versus nonstandard devices: "Some devices, when plugged into charging ports, draw even more power (10 watts or 2.1 Amps) than the Battery Charging Specification allows. The iPad and MiFi 2200 are two such devices.[71]." For more information concerning the USB power specifications, here is the link to the full article: http://en.wikipedia.org/wiki/USB#USB_Power_Delivery_specification. Hope this helps! The newest generation of iPads and iPhones require a higher output USB standard. Older devices will charge fine using the USB out feature of the Solar Battery Charger. Here is part of a Wikipedia article concerning USB ports and standard versus nonstandard devices: "Some devices, when plugged into charging ports, draw even more power (10 watts or 2.1 Amps) than the Battery Charging Specification allows. The iPad and MiFi 2200 are two such devices.[71]." For more information concerning the USB power specifications, here is the link to the full article:... » Read More The newest generation of iPads and iPhones require a higher output USB standard. Older devices will charge fine using the USB out feature of the Solar Battery Charger. Here is part of a Wikipedia article concerning USB ports and standard versus nonstandard devices: "Some devices, when plugged into charging ports, draw even more power (10 watts or 2.1 Amps) than the Battery Charging Specification allows. The iPad and MiFi 2200 are two such devices.[71]." For more information concerning the USB power specifications, here is the link to the full article: http://en.wikipedia.org/wiki/USB#USB_Power_Delivery_specification. Hope this helps! « Show Less