Dell Precision 7710 extended runtime battery or external battery options

I'm going to be traveling to a place where there are sometimes 12 hour power outages.

I run everything though an Eaton 5s UPS right now but it only provides about 20-30 minutes of runtime itself. I thought about upgrading to an eaton 5px + extended runtime battery module which could get me an additional 4 hours, but that's $750 even buying reconditioned and still doesn't quite get me there where I don't have to worry about power outages.

A couple questions:

1.) Is there any external power source external battery device that would power a Precision 7710? I see these for smaller notebooks, but I don't know if any are big enough for something like the 17" 7710.

or

2.) One nice feature of the 7710 is that it has an easy snap in battery with no screws needed to remove the back cover and change battery. Is it possible/advisable to keep a couple batteries charged external to the 7710 so that if there is a long power outage I can just shut down when battery gets down to 10% and snap in a fresh charged battery and run for another few hours and then repeat? Or would external battery chargers for the dell battery, if available, be problematic?

 

I think, you can use battery extended dell KJ321 for your dell 7710.

 

i can't found 7710 in compatiblity list for KJ321. have anyone really tried some external power source solution for 7710 ?

 

KJ321 does not work with the 7710. I'm not aware of any battery that works with the newer Precisions via the ePort. You could swap around the internal battery like you mentioned, or find an actual UPS that has a battery inside and a regular AC power plug.

 

is any 19v/19.5v generic chargers will work?

 

The 7710 will throttle unless it is connected to what appears to be a genuine Dell adapter. (It may be possible to use third-party/generic adapters but they would have to fake the Dell signal.)

 

While the 7710 is not listed as compatible with the 18,000 mAh Dell Power Companion, I wonder if it would work subject to limits on the maximum power drain. It claims compatibility with the Precision 5510 / 5520 and I wonder what power rating it reports to the computer.

I know that my Precision 5510, which is shipped with a 130W PSU which has headroom on the worst case power demand (CPU + dGPU + charging battery + some connected peripherals), will actually run on a 65W PSU with the CPU fully loaded but no dGPU running. Indeed, it will run on a 45W PSU! If one is aiming for maximum run time then the challenge is to avoid battery activities (ie keep the CPU + GPU under control) otherwise get a large automotive battery plus an inverter (I mean large - a 12V 60Ah battery is 720 Whr = perhaps 9 hours at 60W power drain after allowing for conversion losses so several batteries will be needed to power a loaded computer so this becomes a less portable solution than a small generator!). A box of spare notebook batteries might be the way forward but high power drain on these won't be good for their longevity.

John