Jet Battery (Black)

I don't know why the battery capacity decreased too fast !

It's a product that seems underpowered. It works well enough for riding, but running is a bust. I think with the money behind the acquisition in a year or two they will revamp it. Might want to do it quick before someone else figures it out. I returned mine and really, really wanted it to work. At this point, more toy than functional training tool

Works just fine; don't expect it to last for more than 2 to 2.5 hours though. For long (6+ hour) rides I use 3 of these batteries.

Works as expected, not much more to say...

Clips on and off the Jet super easily. All works as expected. Nice.