Ofeely 3.7V 120mAh Battery 501323 Lithium Polymer Li-Po Rechargeable Battery for DIY Mp3 MP4 MP5 GPS

I needed replacement batteries for a Viore 7" Portable HDTV (PLC7V96) - could not find the actual batteries by the name or number on them, so I had to order by size. I ordered the 406080 battery two pack, and these 2200mAh batteries are actually a bit smaller than the original 1800mAh batteries! The actual measurement of the 406080P batteries I received are: 3.96mm x 54.3mm x 81.9mm.I have only had the new batteries in for one day, but so far they work perfectly - the originals were rated to power the TV for up to 1.5 hours, and these just ran 2.0 hours. The batteries came very quick and were exactly what I ordered. One arrived with a full charge of 4.03V, and the other was down to 3.87V, but they both charged up just fine in the TV.Just a note on the installation - obviously I wired these up exactly like the originals, and they ARE connected in series. The original plug is a three pin connection, with the negative from one battery to the black wire, the positive from the other battery to the red wire, and the series connection between the two batteries connected together to the middle white wire. There is no reason why this should have been a concern, since that is the way the TV was designed, but I saw the question where the answer said they could not be connected in series, so I thought I would comment on it. The attached wires on these new batteries are MUCH smaller than the ones on the original batteries, but I assumed that they had to be big enough for the rated power of the batteries, so I just spliced them into the larger wires on the original plug and powered it up.One last comment in case anyone stumbles on this review for the same TV - once the batteries have been disconnected from the main board, the TV will NOT turn on again under battery power until the charge cord is connected the first time - this is true with the original batteries and these new ones. I do not know why it is like this, but after connecting the cord and powering the TV on once, then it works fine on the batteries after that.

Great battery so far, i ordered the 3000mah battery and the one i got was actually labeled 3500mah but has the same dimensions shown, i bought the battery to repair an rca rct6378w2 tablet that got left in a friends car and had become useless due to the battery "puffing" or bloating from high heat, it was a tight fit but it works great and i didnt have to modify the tablet at all to fit it, its a bit heavier now but the battery life is great, my friend says its better than when he bought it which should be right considering the battery i got was marked at 900mah larger than the puffed battery i took out of the tablet, so far i am happy with my buy and would recommend one of these is your thinking of trying to repair something like a 7" tablet

I haven't put these batteries through the riggers yet, but upon my first revealing, I am impressed. I actually have not even tested the voltage yet but I noticed something that either no one else has noticed or don't realize.I'm sure everyone knows lipo batteries are unstable. I mean, they don't have multiple personalities or they are unpredictable or anything like that. They do become unstable when they are drained too far or charged too far. This is why you must choose a good and appropriate charger for lipo batteries. If not, either they can explode or die, to the point that you can't charge them anymore.So, back to why I like these batteries before I've even measured the voltage. If anyone has noticed under the yellow wrapping is a tiny PC board. There is a chip labelled 8205A. This is a Seiko Instruments 8205A LIPO protection chip. So these batteries have built-in protection! But don't take that for granted, be careful with your implementations, regardless.The other thing I like about these are the price. For $13 for two, that's pretty good, especially for self-protected LIPO batteries. I bought some of these  2-Pack of Lectron Pro 3.7 volt - 380mAh 20C Lipos for Hubsan X4  and I killed that battery, probably by draining it under a load test. I did buy a couple more of them, only because their size, but for sure, I will have protection circuitry on them this time.Now, what I don't like about these batteries are they are not printed with their specs, as shown in the pictures. It's not a huge deal. You just have to remember what they are.

Just got this, haven't checked voltages yet, but please to see the IC/Circuit board showing this IS protected as described. A couple of similar cells I got from ebay didn't appear to have any protection, and 1 of them was way too low showing a bad cell. I'll update this if the cell is bad. Otherwise, I expect this to be pretty much as described!

I mean it's a battery. I got it to replace a rechargeable battery in a prop I made that was going bad and this one did the trick. Seems to hold a good charge so far as well.

The 503040 size battery was a perfect replacement for my Skybell HD. You have to cut the connectors off the old battery and solder/connect them, the whole process took about 5 minutes.

For those who ordered a NanoVNA which was shipped without battery (rather common as international ship regulations frown on shipping a device with a live LiPo battery) this is actually a good replacement. Soldered and placed in, no problem; battery seems to work well. Does come with battery protection circuit.

My husband finally got these in to replace my old batteries. He stated that they were made well. No problems with installation and that they were made better than the ones he replaced. They're a lithium polymer 500 mah 3.7 V. Size is 1.6 x 0.8 x 0.2 and weigh 0.3 oz