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Charging ac791l
Cbones201
Member

Is it common that the AC791l is incredibly picky about the charger? I can't use my new iPad charger, an iPhone charger, my usb outlets in my home or my car, nor can I use a generic 4.1A usb charger.  All of these charges work with my iPad, iPhone, and my son's LG phone.  The only device that will reliably charge this jet pack is the original OEM charger.  Additionally I tried several different cables  They are all operational with other devices

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Re: Charging ac791l
7e18n1
Sr. Member

Aha… Based on all available information, YES, the AC791L is picky about the USB power source/charger. The power source likely has to comply with the USB BC 1.2 standard:

http://www.usb.org/developers/docs/devclass_docs/USB_Battery_Charging_1.2.pdf

That’s why it can charge that 4300 MAH battery in 3 hours, otherwise the USB chargers that aren’t BC 1.2 are considered USB1.1 compliant (the most common 5.0V @ 500ma) and can’t power the device and while charging the battery. 

This unit is more than necessary, but is the most cost effective solution I’ve seen:

http://www.amazon.com/Plugable-SuperSpeed-Adapter-Charging-Support/dp/B008ZGKWQI

Look around on Google for some more. Make sure they specify USB3 BC 1.2.

http://www.google.com/search?q=usb+bc+1.2+power+suppy

http://www.google.com/search?q=usb+bc+1.2+charger

> One last thing, I hate having the separate dongle to charge other devices from the jetpack. Is there any benefit to this device over the 6620l? I am tempted to switch.

A comment from the PC Magazine review linked above:

The 6620L is inferior to the AC791L in many ways. Battery life aside it doesn't offer a guest network, no simultaneous dual band, no AC, no dock add-on (if you can find one), single external antenna port, and probably a few other things I've left out. I have two 6620L's with the latest firmware and both have been flaky since day one. They will randomly shut down, even actively using it, on their own even though the shutdown feature is disabled in the gui.

The AC791L has been running flawlessly for the past week, and hands down it's the most stable and feature-rich mifi to date. I sure wish Novatel, Franklin, and Pantech would take some tips from Netgear in order to improve their mifi offerings.

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Re: Charging ac791l
vzw_customer_support
Customer Support

Cbones201, I can certainly appreciate your concerns. Typically with each specific device, it is always recommended to use the OEM chargers. They are the most reliable as they are built to pair with the specific device.


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Re: Charging ac791l
7e18n1
Sr. Member

I have no idea! Not enough communications have traversed this user forum to know much about it. Sometimes people that understand how to write reviews beyond “Best thing I’ve ever seen” or “It’s a piece of junk” actually get technical and discuss unusual characteristics like that USB3 port shown on page 8 of the User Guide. It seems to me it’s only there for the power attributes, because USB2 is more than enough for USB tethering to a computer.

READ the warning on page 8 of the User Guide about the charger.

Normally, what you refer to as a charger, is actually a power supply or an AC Adapter (wall wart) and the rule of thumb is to match the electrical characteristics stamped on the adapter as close as possible and anything that does that should work.

Do you have a laptop and can you charge the Jetpack with the laptop as the User Guide claims?

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Re: Charging ac791l
Cbones201
Member

It won't charge from a laptop, but it will from the desktop. It is just frustrating as you can lose or forget to bring the OEM charger. Normally you could plug into any usb outlet/charger and be fine, but not with this jetpack. The OEM is only a 1Amp charger, and almost any generic usb charger today is at least that much. My iPad charger is 2.1 amp and it will not work, so obviously it is something else. My friend has the 6620l and he does not have this issue. He says it works with almost any charger. One last thing, I hate having the separate dongle to charge other devices from the jetpack. Is there any benefit to this device over the 6620l? I am tempted to switch.

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Re: Charging ac791l
7e18n1
Sr. Member

Aha… Based on all available information, YES, the AC791L is picky about the USB power source/charger. The power source likely has to comply with the USB BC 1.2 standard:

http://www.usb.org/developers/docs/devclass_docs/USB_Battery_Charging_1.2.pdf

That’s why it can charge that 4300 MAH battery in 3 hours, otherwise the USB chargers that aren’t BC 1.2 are considered USB1.1 compliant (the most common 5.0V @ 500ma) and can’t power the device and while charging the battery. 

This unit is more than necessary, but is the most cost effective solution I’ve seen:

http://www.amazon.com/Plugable-SuperSpeed-Adapter-Charging-Support/dp/B008ZGKWQI

Look around on Google for some more. Make sure they specify USB3 BC 1.2.

http://www.google.com/search?q=usb+bc+1.2+power+suppy

http://www.google.com/search?q=usb+bc+1.2+charger

> One last thing, I hate having the separate dongle to charge other devices from the jetpack. Is there any benefit to this device over the 6620l? I am tempted to switch.

A comment from the PC Magazine review linked above:

The 6620L is inferior to the AC791L in many ways. Battery life aside it doesn't offer a guest network, no simultaneous dual band, no AC, no dock add-on (if you can find one), single external antenna port, and probably a few other things I've left out. I have two 6620L's with the latest firmware and both have been flaky since day one. They will randomly shut down, even actively using it, on their own even though the shutdown feature is disabled in the gui.

The AC791L has been running flawlessly for the past week, and hands down it's the most stable and feature-rich mifi to date. I sure wish Novatel, Franklin, and Pantech would take some tips from Netgear in order to improve their mifi offerings.

Re: Charging ac791l
Cbones201
Member

The PC Magazine review is what swayed me to buy the AC791l over the 6620l, so I will probably keep it. I am definitely not happy with the power supply issue or the separate dongle issue. Thank you for finding the USB BC 1.2 standard. I guess surprisingly, however, the latest Apple usb power supplies don't comply with that standard.

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Re: Charging ac791l
7e18n1
Sr. Member

Hum… I thought I read that two of the latest Apple products did. I wonder if Netgear is doing something unconventional with the standard.

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