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🚛 Ship from US Warehouse (TX), arrived about 2-5 days after shipment. System Display shipment time is the amazon system default time, not the actual Arrival time. Our company is a high-tech enterprise specialized in lithium battery pack R&D and production& sales, has 8 years of experience in lithium battery production. the products are mainly exported to the United States, Europe, Australia, Russia and so on. At the same time, there are professional maintenance points in these countries, and any product quality problems can be solved at the first time. In addition, Our company has a warehouse in the US, and the product can be delivered to your address in a short time. Product specification: Nominal Voltage: 48V Rated Capacity: 20Ah Battery Cell: 2500mAH Max Constant Discharge Current: 30A (BMS) Peak Discharge Current: 90A Charger: 54.6V 2.5A Discharge Temperature: -20 to 65°C Charge Temperature: 0 to 45°C Battery Weight: 7 KG Battery Dimensions: 9.7×6.3×2.8 IN How to take care of bike battery? ➡Charging - always use the charger and adapter supplied with your battery, always disconnect the charger after charging. If you won't use your bike for long time, make sure to partially charge the battery every three months. ➡Storage - Keep your battery in a cool and dry place (preferably between 0 and 30°).Don't leave the battery near a heat source. In winter at below-zero temperatures, it will reduces battery performance, the battery need charged and stored at room temperature. In addition, it is advisable to wait until just before you set out before attaching to your bike. ➡Cleaning - Never use a steam pressure washer when cleaning the battery (or your e-bike).Never completely immerse the battery in water. Wiping it off with a damp cloth.