Joyisi 52V Ebike Battery 20AH Lithium ion Bike Battery BMS Protection Board for 1600w 1500w 1000w 750w 500w Electric Bike Kits

I was skeptical buying such a large battery for only $400, and on Amazon no less... But when the "better" options are $200-300 more expensive it's kind of hard not to gamble a little. Having lots of high reviews also helped, so here is what I've got so far:Installation was annoying given the size of the mount and placement of the screw slots, but the Grinn double bob may help to solve any mounting/orientation issues (when it arrives). Right now it's sort of backwards on the down tube and the battery needs to slide "uphill" to fully seat on the mount, but at least it's holding.The battery is paired with a Toseven DM02 mid-drive motor, the drive chain is 42t in the front and 11-42t in the back. My first ride started with a full charge and covered everything from fast flat stretches, to whizzing up long steep hills at 14MPH. Power consumption ranged from less than 200W on the flats to 760W continuous on the hills. I got 51 miles before the battery was at 31%, and no less than ten of those miles were spent at full power. I'm estimating this to be 14 Wh/mile, which is actually very good.First impressions exceeded expectations, but of course this is my first real experience with an ebike so I don't actually know what to expect yet. Further testing will be performed without switching through every power level, and that will give me more useful data in terms of expected range with this battery.Charging is not the fastest even from 75%, but from what I've read a 3A charger should be a fair compromise between charging speed and longevity of the battery. Plan your rides accordingly and charge only when you have enough downtime, or invest in a 5A charger if it really matters that much.Either way, this seems to be a legit battery that doesn't lie about it's capacity, and at this price it's pretty hard to beat. Only time and many miles will tell if it's reliable, so I will update this review sometime in the future once I've gathered more data.

52v 19.2 ah Tesla cell is a great battery. This BBSHD 1000w mid drive motor equipped bike has hit a top speed of 41mph on flat Panama City Beach, FL roads. I use this bike as a commuter and while I don't max it out all the time, I do push it. My AVERAGE speed I'd say is 18-20mph hitting 30- to 35mph in stretches. This battery has given me 44, 41, and 42 miles on it's first three charges respectively and If I slowed down a bit and stayed under 15mph, it probably would give me close to 60 miles. Couldn't be happier with quality of this battery, it's price point, and the excellent customer service I received from the seller. He answered all my questions promptly and professionally. I will certainly purchase again when the time comes.

The battery is very good but it is easy to think there was no installation plate included with order. It is already attached to battery and requires a bit of force and understanding to dislodge. Once figured out, it is easy and very secure but it is tricky to do at first. After showing Joyisi a picture of the battery they sent me, they quickly responded with pictures depicting the battery with plate on and also off. This was enough to show what to do to dislodge plate from battery and re-secure. Very responsive company and outstanding customer service ;)

Came with a much higher quality charger than the Unitpackpower battery I bought for my wife’s e-bike. 3Amps vs 2Amps and the charger is aluminum with a cooling fan the keeps it cool to the touch vs a plastic body that gets over 155f (checked with a temp gun because it was concerning hot to the touch). The charging plug is also much easier to remove when using the joyisi charger. The UnitPackPower one is very difficult to remove, to the point where I’m genuinely concerned it will rip the port right off the unit if not handled correctly. Considering my interactions with Joyisi customer service vs UPP I can say without a doubt Joyisi is going to be the better option to deal with if you have an issue.

I’ve been using the 52v 20ah battery for a couple months. I put it through the paces, including some fairly rough terrain, fast (5amp) charging, full drain to nominal voltage, etc, and have been impressed enough to order a second battery.

I have an 18aH battery to compare with, and this 20aH battery does not last as long as the 18aH. On top of that the charging time to full is extremely fast, which leads me to believe even more that the capacity is not really as big as it claims to be. Power is nice, and burst current is good though

This battery weighs about 8 lbs, comes nicely packaged and has everything you need inside. However, most bikes won't fit the water bottle bracket so you will need the Grin technologies double bob mount. Amazon sells it so order at the same time. Thank me later 😉