Blomiky 2 Pack 7.4V (2 x 3.7V) 600mAh Li-ion Battery with SM-4P Plug for Old Version UDI008 UD08 UDI001 Venom Speed RC Boat UDI001 Battery 2

I have 3 small RC boats, don't remember the brand or model number. If you're looking for RC boat baatteries that normally cost almost $20 each and the connector looks the same, these are probably the right battery. ALL THREE batteries died within a season. These batteries have the same connector, and even include extra chargers. The batteries are bigger, which is good and bad. The good means they will last a lot longer. The bad means more weight. I put a piece of velcro on the battery edge and they fit perfectly on the existing velcro in the boat but it raises the center of gravity, making them slightly more likely to tip. Still better than the originals!

No issues hope they last longer than the original batteries.

Purchased as back-ups for a remote-controlled toy boat, these batteries charge up to full power via USB connection within 3 hours or so. When operating my boat at medium to faster speeds in smooth waters in the cove of a nearby park, a battery would allow for 10-12 minutes of boating action. Not great but it seems there are no other options. The disappointment came after 7-8 charges -- the power ran out much more quickly, within just 1-2 minutes of operating which suggests these batteries have a limited life. I can't give them higher than a 3-star rating.

Boat is running again.

I bought these batteries 🔋 for my new Vector 30 RC boat for extra playing time and they work excellent, the only thing I didn’t realize was that it’s a bigger battery but still fits inside the RC racing boat with no issues, I put Velcro tape and battery goes attached to lid assembly 🙂

The product came as described, Two batteries and two chargers. The charge time wasn't too long and the batteries ran for about 15 minutes. I would definitely buy this again and recommend them as a replacement for the original.

Needed replacement batteries and charger for a remote control boat. For some reason the old usb charger melted leaving us without a way to charge anything. Here is hoping this one lasts longer than a couple of charges.

Both batteries I received caught fire while being used in an RC boat! The first one started smoking a little, so we immediately removed it and assumed it was defective. The next day, we tried the second battery, and it literally caught on fire, damaging our RC boat! We use other batteries in this same boat and do not have a problem with them, so it's obviously a problem with the batteries, not the boat. Perhaps we got 2 defective batteries, but I would not buy these batteries. UPDATE: The seller (Blomiky) replied promptly and professionally to my email and is addressing this issue.