The all new Hailong-3 features several upgrades the Hailong-1 aka Shark packs do not have. The Hailong-3 has an on/off power switch, USB 2.0 port, 3 pin charger connector, keyed locking pin, improved mounting base with adjustable metal bracket and an optional third hole for a very secure mount. Its sleek power packed 52 volt 17.5 Ah 910 Wh profile is much smaller than the Reention Tigershark and will fit on virtually any bike the Hailong-1 battery will fit on. If you are looking for the smallest bolt on battery with the most capacity, the Hailong-3 is clearly the winner. Includes mounting bracket. Requires 3 pin charger.
The LG_MJ1 cells perform slightly better than Panasonic GA cells and are preferred by NASA. See link below for NASA test results.
Genuine LG-MJ1 cells
Mounting bracket bolts onto the bicycle's water bottle mount.
Lockable and removable with 2 keys
Charge level indicator
lightweight ~ 7 lbs
Dimensions: 4.5" tall, 3.5" wide, 14.25" long
BMS 30 amp continuous 60 amp burst
Total pack capacity 17.5 Ah ~ 910 Wh