shpping from china ,10-17days delivery in normal . [battery]: us warehouse is in stock now, 2-7 days fast delivery. built-in brand lithium cell, battery cycle life up to 800-1000 times. [ebike battery package list ]: 1 * electric bicycle battery, 1 * battery 54.6v 2/3a charger, 2 * keys, 1 * mount 1*male connector(defult 5 holes) . if you need other types of connector (eg: 6 holes ,2 holes), feel to contact us, we will send you one compatible with your controllers. [warranty polity & customer service]: we are factory direct sales. all new batteries enjoy a 1 year warranty. we have technical team based to offers the customer support. we has been in long-term cooperation with samsung, lg, panasonic. [prefect compatibility]: choice for electric mountain bike, seems like :ms2 xc sport r500, igo m29r, surface 604 shred, magnum peak, e-glide s/t, addmotor m-560, juiced crossed current s, ride1up 500 series ncm moscow,milano,venice,aspen ebike.500 ride 1up battery, [outdoor waterproof battery]: with a 30a bms protection board to prevent overcharging, overdischarging, overcurrent and short circuit, ensuring long life. come with 54.6v 2a/3a charger, usb port can charge cell phone and other device..syi