Off brand batteries?

[Alan Acock]

I have a Trek XM 7000+ with a 400 watt battery. A new 400 or 500 watt battery has a huge price tag. I looked up "bosch ebike battery" in Amazon and they show a "Joyisi" battery for about $300. It has a very high rating by 16 reviewers. It looks like the shape of the battery I have now.

Anybody know anything about this battery and whether it would fit the mounting on my bike. I see one that is 10 AH/48 volts and one that is listed as 10AH/36 volts. They also show a battery by NBPower that are 17ah/48v and one by CYCBT that is 13ah/48v.

 

[rich c]

I am not going to jeopardize my Bosch system with a no name battery. My first Haibike will soon be 3 years old. If I want to breakdown the cost of another Bosch battery over that time period, it's just not worth it to me. I took a completely different track though, I bought a second Haibike, one for full suspension mtb and one for trekking. So I rotate the batteries back and forth as needed. Nearing a combined 6,000 miles on the 2 bikes with original batteries. Just my opinion, no experience with aftermarket batteries. If the company had a good reputation, why wouldn't they sell them direct?