1.This is large hailong type battery
2.The hailong battery is 65pcs Sanyo GA 3500mAh
3.The down tube battery pack is with UART communication ,which is suitable for Bafang motor
4.Storage for up to 12 months in automatic “sleep mode”
New Hailong 48V 17.5Ah Lithium Battery Downtube Battery Pack By GA 3500mAh With Communication,we use the original imported sanyo GA cell which is made in Japan.this battery can also make 14S5P 52V 17.5Ah for option.