Ur large size of batteries, 18 months for our small size batteries. 4.Various payment: we can accept various payment terms, like tt, l/c and so on. 5.Various type: we manufacture types is very widely, can for ups, e-bike, storage , and telecommunications and so on. 6.Good service: we with specialized person who work for battery marketing more than eight years for good communications. 7.Rich experiences: we have rich experiences to do the oem brand for you to keep you every details as your required. 8.Worldwide customer: wherever you are, all with our stable customer exist for your reference Product advantage: 1free maintenance: the battery is free maintenance, you can use it till the life is the end. 2low discharge rate: the battery with very lower self-discharge, you can store it more than 3 months. 3adaptable condition: the battery design can suite for various conditions, like different temperature.