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How is the battery life on the battery powered ones? Can you air down for off-road then reliably air back up with them? This is mostly directed toward anyone who has had them for some time. Batteries are all great when new, but as they go thru charging and heat cycles the capacity diminishes.
I have a husky corded inflator, but wanted a cordless one for our travel trailer. It's not necessary, but extremely convenient and given the limited aux power port availability on the ascent and my legacy it made sense. But again I'm not offroading, for that something with more gusto makes complete sense. Also fwiw modern lithium packs lose negligible amounts of capacity over their life time, the quality of their cells is what matters, milwaukee, dewalt, and ryobi are all good quality. Probably better than the battery under the hood...if oem then definitely better, lol.

For the milwaikee 12v a 1.5ah pack is good for inflating my ascent tires from 33 to 45 on all 4 with 1 bar left, or 1 225/50/18 tire from completely flat to 33 psi and about half a charge left. Ive also got a 6ah pack which would be plenty to do all 4 tires from flat with appropriate cooling periods.
 
I just got the Dewalt one for airing back up after offroading. Haven't "used" it yet, but quick tests show it to be very nice!
I, too, have the Dewalt battery platform so this was the logical choice for me. I love how you can set the pressure, turn it on and it will shut off by itself while I tend to other things. It also has a low-pressure, high flow function for inflating rafts and such. This feature also works well for blowing off sawdust from me, my saw and workbench. I got it at Christmastime for $79 from Home Depot including a battery. Currently $99 on Amazon, sans battery.
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I, too, have the Dewalt battery platform so this was the logical choice for me. I love how you can set the pressure, turn it on and it will shut off by itself while I tend to other things. It also has a low-pressure, high flow function for inflating rafts and such. This feature also works well for blowing off sawdust from me, my saw and workbench. I got it at Christmastime for $79 from Home Depot including a battery. Currently $99 on Amazon, sans battery.
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I have been waiting for it to come down; that's a good deal you got with battery.
I guess i'll keep an eye out to see if comes down...
 
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Also fwiw modern lithium packs lose negligible amounts of capacity over their life time, the quality of their cells is what matters, milwaukee, dewalt, and ryobi are all good quality. Probably better than the battery under the hood...if oem then definitely better, lol.
Thanks for the real world feedback.
I just don’t think I trust even newer lithium batteries that much. The dewalt drill I use at hΩ had great battery life the first year or so. I could do just about anything on one battery. But now I keep both batteries with me anytime I’m doing a project and throw the first one back on the charger as soon as it’s depleted.
I have a cheap (it was in the trunk when I bought my used bimmer) 12v compressor I keep under the trunk floorboard in the Ascent. It’s footprint and weight are small, but it’s more tedious to use t doesn’t have a reliable gauge or auto-stop on it so I also keep my trusty pressure gauge in the center console.

Funny you mentioned the battery under the hood! My 2019 (July 2018) oem battery is still going strong after 41k miles!
 
(borrowing the pics above, thanks)

I use(d) both the P727 (died finally, but still under warranty - just need to find the receipt) - it does not have a "set pressure" feature.
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and the P747 - one of my favs, as I ALSO use it to pump up my air mattress when camping.
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I prefer the P747's ability to set and walk away. The Ascent Touring's 100W AC inverter is powerful enough to charge them using any of the standard Ryobi One+ chargers.

I also use this, which is also settable, and very small, yet as fast as the two above (12V accessory outlet required for use - it is not battery)
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I, too, have the Dewalt battery platform so this was the logical choice for me. I love how you can set the pressure, turn it on and it will shut off by itself while I tend to other things.
I did use it yesterday and it was awesome. Set to 38PSI and press go and just wait. Aired up from 28PSI with no issues. Didn't take too long to air up all 4 tires, but it feels like forever when it's 106F outside :D
 
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