E525 PRO Replacement Battery Set - 3.7V 1800mAh Lithium Battery and Charging Cable for E88, E88PRO, E525 PRO RC Drones

As delivered, these quadcopters have only 5 minutes of flying time, though claim over 10 minutes. These batteries are the same size, fit fine and provide 10 minutes air time.

All worked as they should

The first thing I noticed was these batteries are much lighter than the (claimed 1800mAh) batteries that came with my drone. They require a couple of re-installations to make connection in the drone.I charged them until the red light turned off and after what seemed like 2-3 minutes I was barely able to get the drone to a safe landing location after the 'low battery' beeps.After charging overnight, I could only get 3 minutes of hover time. This compares to the original batteries which last 10-15 minutes.I plan to return them.

Work well

EDIT: Ok, so .. I tried the fix I typed up below, and, it didn't end up working. Charge each battery 3 times THEN use them and still no more than about 5 minutes battery life, consistently, for each one, the same. I'm thinking the timer in each batteries chip was not updated and the over-charge protection circuit was not updated to amount for the extra capacity of these batteries. I ended up ordering the 2,000 something mAh ones and they're 'better' (not all the way), about 10-ish minutes or so, each, but that's still better than these ones and a bit better than stock batteries anyways.Thank you.- - - - - - - - - - - - -These batteries are NICE nice. Same weight (alot of the times such high extra capacity adds on too much weight for the drones to carry), high capacity, fit INTO drone just fine, etc. .. HOWEVER .. there is one SINGLE flaw in what they did when they made them; They didn't change the timing of the timer built into the battery to turn it off after FULL charge. So .. it charges it like it's still a 600mAh battery. It charges, and the 600mAh timer kicks in before over curcuit protection does (which I'm assuming is built into each battery's chip as well) .. What I'm ASSUMING as of writing this is .. if it's "thinking" it's still a 600mAh battery, and, as far as I'm concerned there is no shutoff for overcharge, even if it was going to happen it's still not topped off enough in charge to happen. SO .. THAT being said .. what I'm ASSUMING is that .. say .. 600 times 3 is 1800, right? So .. if these batteries are 1800mAh in capacity then it would only be LOGICAL out of common sense to charge them 3 times each. Which is the FIX. Again, I'm just assuming this! But as far as I'm concerned how they've been reacting in my drone is they only get about 5 minutes flight time (not just hovering but full throttle here and there). So .. if it's 5 minutes flight time, the regular batteries (stock) are about 7 to 10 minutes then THAT is how a higher capacity battery ACTS when it is not charged to it's full capacity, is that 5 minutes. Cuz there's more there IN it. At that SAME capacity WHILE being a 1800mAh but only charged TO 600, it gives a shorter time. Give or take the actual efficiency of the chemical consistency of the actual cells and where the items to build them were sourced from, etc.SO! If I am inclined ever so much as to update my review after actually doing this (which I am testing right now as I type this up they are on charge being rotated 3 times each), then, I will do so and let you guys know that it ended up working or not. Like "oh hey these batteries are GREAT you just gotta charge each one 3 times!" lol .. Til they update the circuit or whatever, blah blah blah ..LONG STORY SHORT: 1800mAh aftermarket batteries, built in timer in battery chip NOT elongated (probably stock chip still) for extra mAh capacity (according to my research, first-hand owning these and using them a number of times), SO, charge each one 3 TIMES .. because 600 (stock mAh) x 3 (charges) = 1800 (aftermarket mAh) now, then .And if anything the over-circuit protection will keep kicking in once they are topped off AT that 1800mAh (which will be my arrival upon knowing or not if THAT circuit is there, too). Cuz, you know how good people are at just adding that circuit protection in these days to such a small device anyways ..So .. until then,Thank you

Allows for extended flight!

I should have measured my old battery, these were way too big although it says that they fit my foldable drone but, no worries because I was able to open my old one and a new one and solder the new battery inside of my battery case.

goid