Talentcell 24V Lithium ion Battery PB240A1, Rechargeable 22400mAh 82.88Wh Li-ion Batteries Pack with DC 24V/12V and 5V USB Output for LED Light Strip, CCTV Camera, Smartphone and More

Performance: Delivers on what I need it for, running my ResMed AirMini while on an airline flight or while camping. The labeled 82.88wh is comfortably below the airline limit of 100wh for carry on. While claimed 82.88wh by TalentCell, under test with a Optim CBAIII from full charge 29v down to 22.5v, at a 0.5amp rate, the battery delivered 72wh actual. This amp rate is roughly double what my ResMed AirMini draws in use, so actual real life usage, it may deliver somewhere between 72wh and 82wh. Given that the ResMed AirMini requires roughly 25wh per night, this equates to a comfortable margin of error for operating for two nights on battery power between recharges.The Good: As you can see by the teardown photos, it is indeed assembled with seven 18650 cells correctly spot welded together with nickel strips and safety taped with Kapton tape. The components appear to be of good quality and assembled well.Opportunities for improvement:1. The rocker switch protrudes beyond the face of the unit, making it too easy to accidentally turn on or break during transit. If turned on, the battery could be dead before needed because the LED lights run all the time. An improvement would be to update the design so it is not possible to accidentally kill the battery in transit, while bouncing around mixed in with other equipment.2. Compactness. The case left room for two cells that were not installed, making it bulkier than necessary. Either shorten the pack, move the controls further inside the case for protection, or arrange the seven cells flat so the entire assembly can be reduced to 1 inch thick for better packing with other stuff. Either of these three options would make for a better use of volumetric space.3. Complexity. Since it's a 24v battery, all that is really needed is just the single 5.5x2.1 port. This would enable the elimination of the on/off switch, the 12v port, the USB port, and the 5.5x2.5 port. Doing so would reduce cost, confusion in use, potential for accidental discharge, but retain the core use case of operating 24v cpap machines.All things considered, I'm quite satisfied with this unit for it's intended purpose. I plan on using it to operate a ResMed AirMini on international airline flights and while camping away from power. My testing shows that this will be successful.

Work good for what I need to do

Just tried it out, and I got 19 hours of use with my airmini CPAP.

From other reviews it was unclear if this battery (PB240A1) would work with a standard Resmed Airsense 10 (some say yes, some say no) so I decided to try it out and see. I wanted a battery that would work for very occasional (when the power goes out) use and be easy to travel with.This particular TalentCell battery is especially desirable for those who regularly travel since its capacity is under 100 Wh (meaning you can legally carry it on a plane, unlike TalentCell's larger capacity batteries that are more than 100 Wh). If you're not worried about that (e.g. you want a battery for camping) then their larger capacity batteries (PB240B2 and PB240B1) might be a better choice for more extended usage.In trying it out I paired this with this cable to connect the battery to the Resmed (plug one end into the 24V port on the battery and the other end into the Resmed):https://www.amazon.com/gp/product/B07RFH6JQJI also turned humidity off in the Airsense settings (since that's the major power hog in the machine). If you have a heated tube you'd want to turn that off too.The Airsense ran all night without any problems. In the morning 3 of 4 LED lights on the battery were still lit up, suggesting this should be able to power the unit for multiple nights between charges. In my case the pressure was set between 7 and 13. Just to make sure maxing it out wouldn't be likely to cause issues I bumped max pressure up to 20 and ran Mask Fit, which ran perfectly fine, suggesting the battery should be able to deliver enough power to maintain that.So why have others not been able to get this battery to work with their Airsense? My guess is that instead of using the cable I mentioned, they're using the Resmed DC to DC converter and hooking that into the 12V output on this battery. According to the product description the 12V output only supports up to 2A of current (really, only 1A of current after converting to 24V) and that's probably not enough to run the Airsense. Meanwhile, the 24V output on the battery says it supports up to 3A of current, which is plenty to run the Airsense.There is one quirk in using the 24V output on the battery, though: According the product description it doesn't maintain a consistent 24V output, but rather somewhere between 29.4 V and 21 V (this probably means it outputs 29.4 V when fully charged and output drops to 21 V right before it shuts down due to low battery). This didn't affect device performance for me, but I'm really not sure how sensitive the Airsense is to the input voltage being a little off and if I was using the battery often I'd look into that before selecting a battery. In my case I'll probably use the battery sparingly since it's just around as a backup so in case the power goes out. I'll also try to keep the battery stored at about 3/4 capacity, which should be enough power to get through a night without issue, should help with longevity of the battery, and should get me closer to a 24V output when I use it.

I brought two of this. One of them stop taking charge after a few use. The other one is working well. It stay charged for a long time. It has multiple output option I can only use one output at a time. It is light weight. It fit well in my camera back.