This is the Hailong Downtube E-Bike Battery with mounting bracket and key-lock
17ah = 840 watt hours
New and improved Jumbo Shark Pack to contain massive amounts of cells.
Now includes an ON/OFF Switch and built in USB port for charging you own smartphone or other peripheral devices such as high power bike light
Key lock releases pack from bike
Led light battery meter for quick reference to check your pack's charge level when not on the bike.
Case is constructed of durable hard plastic to protect the cells
Up to 768-watt hours means incredible range in small package
13s5p = 65 18665 Cells
30amp continuous BMS
Just a bit bigger than the standard shark

SPECIFICATIONS:

Battery Model	48V 17.5AH
Nominal Voltage (V)	48V
Nominal Capacity (AH)	17.5AH
Source Resistance (mΩ)	<40mΩ
Cell Combination	13-Series , 5-Paralles
Cell Type	3.7V 5C Powerful 18650 Cell
Battery Size	36011090 mm
Discharge Cutoff Voltage (V)	39+/-1V
Charge Cutoff Voltage (V)	54.6V
Rated Discharge Current (A)	20A
Maximum Continuous Discharge Current (A)	30A
Instantaneous Maximum Discharge Current (A)	60A
Maximum Continuous BMS Limited Current (A)	30A
Maximum Instantaneous BMS Limited Current (A)	60A
Maximum Continuous Charge Current (A)	2A

Charge Mode	CC/CV
Standard Charge Current (A)	2A
Charge Time under Standard Charge Current	8 hours
Charge Temperature Range	0-55°
Dissipate heat	Automatic fan
AC voltage	110~220V

Other information
Discharge Temperature Range	-20-60°
Battery Net Weight	4 kg
Cycles	>900 times
Recommended for e-bike motors:	50W~1000W

Shimano

Shimano STEPS Battery Mount, BM-E8020