VIFLY2pcs StoreSafe Smart LiPo Battery Discharger to Storage Voltage with Heatsink for 2S-6S RC FPV Drone Battery (2pcs) (XT30)

Takes days to discharge a battery ?? maybe my expectations were too high

Yep. The StoreSafe is safe, and very clever, but too slow. I figured I'd risk it and buy it to at least give it a test. I am really impressed with everything, except the fact that this is not a practical way to discharge my fully charged 4S FPV Drone batteries. To bring a 1300mah 4S1P down to 3.8V per cell, it would take 8 hours or more. The good news are that the heatsink does not get hot enough that it could burn something that it is touching (wood/plastic/cloth); and it is smart enough to know what size battery it is discharging and when to stop discharging. The logic programmed into the little board is excellent, the LED indicators are very bright, and the whole thing is strong and looks like it could take a beating. It is extremely compact so it's easy to leave it attached to a Lipo while in a lipo bag, etc. I will probably use these little gadgets to further discharge packs that are close to 3.8V per cell only as I do not want to wait half a day to discharge my full packs. For that I have a proper charging/discharging setup. One last thing to note: a StoreSafe does NOT balance the cells in your Lipo. In my tests with healthy lipos, it was very good at keeping cell voltages even all the way down to Storage Voltage. Your results will depend on the individual health of each cell and how far apart their voltage is when you connect the StoreSafe device. Overall it is a great value and a clever execution for somebody that understands its limitation (speed).

I'm trying to take better care of my LiPo battery packs for my R/C airplanes, and my current chargers don't have a discharge capability. These do the job, discharge to 1/2 capacity (typically 58%) and stop. My new packs haven't puffed and are holding up well so far this summer. I have had some issues where I plug them in to a fully charged pack, and the LEDs go out after several minutes, when I know the pack has not been full discharged. Unplugging them, waiting for a few seconds, and plugging them back does the trick. I've left them on for a few days after the LEDs have gone out and the pack reads 58% the next time I go to charge it. I've used these on 2S, 3S, and 4S packs and they always get the cell count right. I used them to condition a new packs, charging it, and discharging it several times before putting it in service.

These things are, well, priceless. If you're like me, in South Florida, and you go out for some FPV and get interrupted by rain, get the phone call, or whatever it is, out of time to fly... just throw these guys on those batteries. Done. As easy as capping your batteries (if you use those). I got a couple of both XT30/XT60's, and all four work amazingly well. Always detect the right cell count.. great logic/code in these!! Thank you VIFLY!!!

This is one of the most amazing products I've found in a long time. It does exactly what they say it will. It helps your batteries sooo much & saves there ability to work for a long time to come. I plain to buy more soon. I only wish they had other options for this exact battery saver. I mean different plug types, they have them for the XT-60 & XT-30 plug types. Just not for any other battery plug types (that ive been able to find so far) If someone reads this & know of other ones of this brand that can be used on other plugs please fell free to find a way to get ahold of me or leave comment on mine just any way you can think of lol. I think its well worth the price easily. The description of the product is right on. And anyone can use this without any problems, all you do is plug-in & that's it. But be sure to read instructions due to the amount if battery power you need to have to put it on. Not suree if that's the greatest words to use but shows that you need to read instructions to be sure your doing what is asked. Great product!