FLEXTAILGEAR Zero Pump Air Pump for Inflatables, 1.2 oz Ultra-Mini Electric air Pump Portable Air Mattress Pump, Rechargeable Air Pump for Pool Floats Air Bed Air Mattress

My first thought was “Where have you been all my life”. After many years of blowing into sleeping pads, using the built-in hand pumps, or the giant stuff sacks that squeeze air into the pads … I have finally found a MUCH BETTER solution. The Flextail Zero Pump is astonishing! The entire carrying weight (pump + battery + adapter) is 2.15 ounces, and measures about 1” x 3”. The pump inflates all my pads in less than 90 seconds, deflates them in less time, and can inflate my largest sleeping pad 25 times on a single battery charge! And I found a great little plastic container on Amazon to safely pack the pump and one adapter when travelling (see below and pics).Details: The pump inflates my Large Thermarest NeoAir XLite NXT (largest size they make) in 80 seconds and deflates it in less than 60 seconds. That is getting the pad to a “hard inflation” – not soft or squishy. The pump inflates my Exped Synmat7 LW (Large Wide size) in 53 seconds (also “hard inflation”). It is not as good at deflating the Exped pad since the pad has built-in foam. But overall, I was stunned – it is fast and generates enough air to actually inflate the pads even past the point I would normally fill them. People complain about the noise of the pump – I think it’s not an issue. Yes – it runs at high speed and sounds a little like a dental drill. But it’s not as loud as normal speaking voice, and it’s only for 80 seconds.Adapters: The box comes with 6 different rubber adapters, designed to fit the pump on to many different sleeping pads. It was easy to find the adapters that fit my 2 pads, and the rubber adapters really created an airtight connection. Some folks complain they cannot find an adapter that fits their sleeping pad. But that’s why we order from Amazon – return it if it doesn’t work for you.Power: I ran the pump, beginning with a fully charged battery, until it ran out of power. That took 33 minutes. Based on that, I think I could inflate my Large NeoAir pad about 25 times. Surprisingly – this actually matches what Flextail states on their website 😊 Or inflate and deflate it 14 times. I could almost go for a month of backpacking if I only used this pump to inflate my sleeping pad. WOW! Note: you must double tap the power button to start the unit – which is a nice safety feature to prevent it turning on accidentally in your pack.Battery: The unit comes with a RCR123A battery that provides 650 mAh (or 2.41 Wh) of energy. The battery needs to be taken out of the pump to charge; the battery has a built-in USB-C port and can accept charging at 350 mA (which is so low, almost any charger will charge it). It took about 2 hours to charge the battery from 0% to 100%. The battery has 2 small LEDs on the top (“+” terminal) that glow red when it’s charging, and green when it’s charged (see pictures). The manual states you should not swap this battery for a regular “CR123” type of battery. I tested it with a CR123, and it ran fine. Seems to run a little slower – which makes sense since the CR123 is a 3.0V battery and the RCR123A is a 3.7V battery. Other Amazon reviewers also report it works fine with a CR123. If you want to stick with the RCR123A (I plan to), those batteries are not available everywhere, and this might be a problem on long through hikes if your battery hits its end of life. You can easily order another RCR123A (e.g. from Amazon) and obviously you can carry a spare. More interestingly, you can swap out the battery for another RCR123A with more power. Flextail sells a battery on their website with 900 mAh, Amazon sells 800 mAh, and there are batteries up to 950 mAh on the market. 900 mAh should give me 34 inflations on my NeoAir pad.Concerns: The case is made from thin aluminum. I worry that I could easily bash the case in my backpack – which could make it impossible to unscrew the case to charge the battery, or damage the pump housing. The solution is a 100ml Transparent Plastic Centrifuge Tube – which is big enough to hold the pump with one attached adapter (needs internal dimensions of 100mm x 32mm). See pictures. Total weight with pump, adapter, battery and centrifuge tube is 2.85 oz. A five pack of these tubes is about $7. (See https://www.amazon.com/Transparent-Plastic-Centrifuge-Graduated-Bottom/dp/B0C4TC59X3?pd_rd_w=qlLls&content-id=amzn1.sym.2fa40e00-e100-448a-9cac-99baa94dfabf&pf_rd_p=2fa40e00-e100-448a-9cac-99baa94dfabf&pf_rd_r=DKC7SPTYTJK1GQ6KR7VN&pd_rd_wg=cs1RM&pd_rd_r=0f772bdc-615a-4b3f-8870-926c3d0078c1&pd_rd_i=B0C4TC59X3&ref_=pd_bap_d_grid_rp_0_1_ec_pd_nav_hcs_rp_2_t&th=1)Because rubber can tear, I worry a little about the longevity of the rubber adapters. The ability to order extra rubber adapters would be nice. Lastly – old guy speaking - a larger manual with bigger print (manual pages are 2” x 3.25”) would be appreciated.

These are "awesome"!!!I used it to air up my sleeping pad. It has several fittings (find the one that fits) and have it air up your pad while you are doing something else! You can hear the change in sound when it's near completion! It works awesome! I haven't had a chance to use it in the field yet, to see how many times it will run on 1 battery charging, but when I do I'll update this review."THIS DEVICE" is to backpacking what being seen drinking a Starbucks is to your social status! LOL These are just plain "cool"! They work very well, are extremely light, and the powerful battery inside recharges with USB-C so that it charges quickly. I ordered a 2nd battery just to be safe, but reviews are indicating this battery will stand up through several inflations during a backpacking trip! You can't go wrong with this device!It's the Porsche item to take on your next trip!P. S. I want to buy a 2nd battery to have a charged one on-hand, but can't seem to find these; still looking

2ND EDIT: Since the replacement batteries didn't work, I contacted the company and they replied the next day requesting a short video of the problem. I sent one immediately but then had to ping them twice before they responded - they offered me a full refund or a replacement. I chose the replacement hoping that I had just received a stray bad pump before. It arrived today and same problem. It was shipped with the battery installed so I charged it fully and even tried one of the other replacement batteries I had purchased for the original pump. Still the pump would not run. At this point the ZERO pump offers ZERO confidence and deserves ZERO stars. I have contacted the company and volunteered to ship back both pumps at their expense in exchange for a full refund of the original purchase.EDIT: I ordered replacement batteries, RCR123A with the built-in charge port similar to the original battery - it was a 2-pack. I did not expect the batteries to be charged but they were slightly longer (maybe 1mm) so I put one in to make sure they fit, and the pump ran. I pressed the switch again, nothing. I put the other battery on the charger until it turned green, put it in the pump, nothing. So I put the first battery back in - nothing. Isn't this the definition of insanity? Expecting a different result??? LOL. Next step... I'm calling the company to see what they suggest. I love this pump when it works but still not confident enough in its reliability to depend on it in the backcounty. I just returned from a 3 day trip with a friend who also has one but hasn't had it long. She wisely had removed the battery when storing but did comment that it didn't seem as strong as when she first got it.I've had mine a little less than a year and it no longer works. It was great in the beginning - the adapters allowed me to use with my Nemo air pad and my Exped foam mattress. I'd used it maybe 4-5 times, then one time, it wouldn't come on. I thought maybe it had accidentally come on in my pack (you'd think I would have heard it) and run down my battery. I recharged it, put the battery back in and hit the switch. It ran, I turned it off, hit the switch again - nothing. Recharged the battery again, repeated with same result. Now it won't come on at all. I'm going to try a new battery but it could be the switch. Either way, I need dependable gear in the backcountry and I'm not confident enough in this pump to not carry a backup so why take it?