36V 8Ah Electric Bicycle Water Bottle Type Lion Battery Charger

Awesome product, easy to install, so far it has met my expectations! works for great for my bike!!

I'm using it as a booster battery for a Gotrax GXL electric scooter. It works, but there were a few problems:1. When locked with a key you can still pull the battery out - in fact it falls out. And you can't put it back in without unlocking. Had to use a worm-gear clamp to keep it in place. Hopefully that's enough of a deterrent.2. The output voltage is actually 42 volts, not 36 volts! I suppose it's not a huge deal for me, since the charger for the scooter is a 42 volt charger. So I basically plugged the battery into the charging port and it seems to work great that way.3. The USB port is inaccessible when the battery is inserted into the holder. You can't charge accessories while on the road. Somewhat of a strange design choice.4. Recently (after a month or so of use) the power meter stopped working. The battery has not been exposed to any outdoor moisture yet. It still works, charges and discharges, but I have to take a star offWith that said, the battery did work for my use case and charges fine. The scooter's range has been DRAMATICALLY increased. After over a year of abuse, the scooter would only run for 2.5 miles before completely draining the built-in battery. With this add-on, I was easily able to complete a 12+ mile ride with lots of energy to spare. The booster battery showed well over 50% charge after that ride, hills and all. It has given the scooter a whole new life, and I can make trips further than ever before, all while not worrying about running out of juice and avoiding Seattle traffic. Beats buying a new scooter!!

After the first five hours of use the battery ceased to work. The repair man had to replace the fuse and open up the back to rewire and solder a piece costing me 20$. After half a week of light use the part used to hold the battery in place with the key fell off. Almost causing the battery to fall off. This could not have been caused by me since it's the part that's pre installed that fell off. But the battery dies currently work I guess.

I got one battery and it was a doa it put out 0 volts at the battery so I had to order a replacement through Amazon and they were quick as always to replace it the second one I got works great I also messaged the seller and they were quick to respond and said I could return it and get another one all in all it was a good experience quality control could be better but it happens

This battery lasted two charges and will no longer charge. Complete garbage! It happen to last just long enough to not be able to exchange it. Complete waste of money

Long lasting

After returning the first battery because it was faulty. The company back it and sent another battery which work well and I'm very pleased with it now.

Fuse burnt out and the connections don't correspond to other e-bike kits I had to go through hell to get my electric bike running and now I'm having trouble getting a new fuse