aventon replacement battery pack li-ion 48v 14ah 672wh for pace 500 electric bike with charger

nominal voltage: 48v; nominal capacity:14ah ; compitable motor power: 48v 250w 350w 500w 750w; net weight: approx 3.6kg; color: black; charge port: dc 5.5*2.1,optional 3pin; continuous working current: 25a; peak woking current: 80a; warranty:1 year or 12 month; cell: 18650 3.6v 3500mah; assembling type: 13s4p; cycle life: more than 800 times; power connector: 2 pin; if shelve a long time suggested that the battery voltage 48-49v, need for regular recharging (even if not use), must charge and discharge for three months one time.syi