Power Your Quadcopter With 4 3.7V 500MAh Lipo Batteries And X4 Charger Set - Compatible With UDI U818A RC Drone Series Review

Batteries work great, and nice to have a charger that charges all four simultaneously. Ordered this because I misplaced my one battery that came with the U818a. Given the short flight time of the U818a, it is so much nicer to be able to swap out for the next battery and keep going. We would have enjoyed the drone experience so much more had we had these extra batteries these last couple years. Recommended. Make sure the connectors are pressed in all the way for charging and flying.

Got these for my daughter's U818A HD drone we got for her last Christmas. Original batteries were worn out so tried these. BIG mistake. Only 10 seconds flight time on full charge. Complete garbage and borderline fraudulent. Throw them in the recycle bin as soon as you receive them if you are foolish enough to purchase them.

I purchased this because it had good reviews, I charged them and the flight time was probably 2 minutes or less, a week later I couldn't even start the drone. It was a waste of money.

I read a lot of reviews on this one before buying. Knowing I could get something that was really good or really bad I didn't have a whole lot of expectations. I wasn't delighted but I wasn't disappointed either. The batteries are a little short on life, which is one of the disappointments - but they're not that bad. The charger unit itself - I knew going in what to expect. And yes, like others have said, the plugs that go into the charger are a bit problematic. It's my plan to modify the…

So I got these and was very excited to have the extra juice. So I charged them up and gave them a shot. After under a minute the batteries were dead! Surprised, I recharged them, but this time with a two separate chargers. Two were charged with the supplied charger, two charged with a charger from a previous set of batteries I had. After they were full charged, I tried again. Much to my dismay, they were still dying in under a minute. My drone builder supplied batteries lasted over 7 minutes…

Perfect size and extra power for my 1/24 rock crawler. Fast charge and the included 4 unit charger is perfect. Highly recommended for small scale vehicles and drones alike.

Three of four batteries were not able to hold a charge - seller was responsive and i returned for refund. Thanks for attention.

It is impossible to get batteries to maintain a connection with the charger for anything more than a couple minutes. The 4 batteries' cables can be inserted into the charger at once. At different points on the charger. After one battery has been connected, the slightest tough of the charger causes the first battery to lose its connection. I spent 10 minutes adjusting the 4 batteries in the charger to where I finally had all 4 LEDs lit up and batteries charging. I walked away thinking I finally…

Two of the battery plugs just fall out, meaning the won't stay plugged in to the charger. Seems like a potential fire hazard. Not sure yet of the battery quality but the charger is really poor quality. Probably going to return it all. I'm curious if I'll hear from the seller. Tried to contact them but I can't seem to figure out how. Will update this review depending on how well the batteries work and if I hear from the seller.

I bought cheap, I got junk, no one to blame but myself! 1 works about as good as my worn out batts, 2 trip my lo batt indicator right off the charger and have no real runtime and 1 was completely DOA. Charger so so, batteries smaller than holder so fall out of my quad. Missed my return window or I would have returned. Wishing negative stars were an option.

I purchased these for my UD818A drone and used them 2 times. After 2 charges, they didn't last 30 seconds of flying time. Very disappointed with revain's choice battery. Don't waste your money.

I bought these batteries for my drone;. They are the exact same voltage and size, but even after charging and draining them several times, they do not seem to hold enough power to fly the drone for more than 30 seconds. At this point, I think it is too late to return, so it's looking like a waste of money.

These are good quality replacement batteries. They hold a charge fine, and based on play time they seem to have the advertised capacity. It's also nice that it comes with a charger that can charge 4 batteries at once.TIP: The connector that fits the charger has to be pushed in VERY firmly, or it will not make a connection and you will get no charge at all. Once inserted firmly the charger works perfectly.

Ordered these for my son's drone. Thought WOW what a great price, & for multiple batteries! Well unfortunately, even after charging, the batteries only last a few mim less than 5min! The look of excitement on my sons face when we finally recieved them only made his disappointment that much worse. I don't know if maybe we just recieved a bad batch or what the problem was? Thankfully we didn't pay a lot for them.

I used this product to replace a worn out battery and charger for a small RC helicopter. Product worked as advertised and the price made it a great deal.