Bottom Discharge 1000W 48V 21AH li-ion battery 48V Electric Bike Battery Use forSANYO 3500mah cell 30A BMS Free customs free Lithium battery features: 1.Life expectancy is two times that of lead-acid batteries.The weight is more lighter 2.No memory effect and rechargeable.the battery life is more longer 3.Safer and more environmentally friendly, No heavy metals and hazardous substances. 4.Built-in IC chip will prevent battery pack over charge, over discharge, over-current, over-heat,short circuit . 5.Avoiding mechanical accidents caused by vibration. Parts included 1. Lithium Battery with Aluminumcase 2. Built-in 30ABMS board 3.Aluminium Slide Bar (to fix battery on bicycle) 4. 54.6v 2.0a Charger (With EU/US/UK/AU AC Charger plug you can choose) Product Specifications Battery Model 48v 21ah Nominal Voltage (V) 48v Nominal Capacity (AH) 21ah Source Resistance (mΩ) about 40 Cell Specification 3.7V 3.5AH Cell Combination 6-parallel 13-series Cell Size Sanyo18650 Cell Quantity (parallel*series) 78pcs Discharge Cutoff Voltage (V) 30+/- 1V Charge Cutoff Voltage (V) 54.2v Rated Discharge Current (A) 30A instantaneous Maximum Discharge Current (A) 90A Maximum Continuous Discharge Current (A) 30A Maximum Continuous Charge Current (A) 5A Charge Mode CC-CV Standard Charge Current (A) 2A Charge Time under Standard Charge Current 10.5hours Fast Charge Current (A) 5A Charge Time under Fast Charge Current 4.2hours Charge Temperature Range -20-55°C Cell Size (L*W*T ) 390*110*75mm Battery Weight About 5KG Battery Power 1000W Feature: 1. Cells -A grade cellsto make sure batteries inhigh and full capacity 2. Protection -Dual IC chips, that can anti-short circuit, anti-over charger, anti-over current, anti-overload 3. Compose Type : Injection Technology tomake battery more stable. 4. Certifications : CE,UL,FCC, RoHS, ISO9001 5. Long life cycle, No memory, environment friendly. Precautions: Do not immerse the battery in water or seawater, and keep the battery in a cool dry surrounding if it stands by. Does not use or leave the battery near a heat source as fire or heater Use the battery charger specifically for that purpose when recharging. Do not reverse the position and negative terminals. Do not connect the battery electrodes to an electrical outlet. Do not discard the battery in fire or a heater. Do not short-circuit the battery by directly connecting the positive and negative terminals with metal objects. Do not transport or store the battery together with metal objects such as hairpins, necklaces, etc. Do not strike, trample or throw the battery. Do not directly solder the battery and pierce the battery with a nail or other sharp objects Battery Quality: 1. Cells - A grade cells to make sure batteries in high and full capacity 2. Protection - Dual IC chips, that can anti-short circuit, anti-over charger, anti-over current, anti-overload 3. Compose Type : Injection Technology to make battery more stable. 4. Certifications : CE,UL,FCC, RoHS, ISO9001 5. Long life cycle, No memory, environment friendly. Advantages: 1. High energy density 2. High working voltage for single battery cells 3. Pollution-free, environment friendly 4. Long cycle life; It extends its cycle life up to 800 cycles 5. Capacity, resistance, Voltage, platform time consistency is good 6. Simplifying battery management system (BMS) and a battery charger 7. With short-circuit production function, safe and reliable 8. Factory price & High quality 9. Fast charging 10. Light weight, small size 11. Large overcharge tolerance and safe performance 12. Self balance Payment: 1) We accept Alipay, West Union, TT. All major credit cards are accepted through secure payment processor escrow. 2) Payment must be made within 3 days of order. 3) If you can't checkout immediately after auction close, please wait for a few minutes and retry Payments must be completed within 3 days. TransportDeliveryTime: Battery is a special product, all batteries need several cycle tests before delivery, so production and test time need about 5-7 days; Delivery Method: For European Union buyers: All parcels usually are shipped by UPSshipping,it will air to France first,then to the destination countries via DPD or UPS. Thedelivery time is usually 8-12 days after dispatch. Customers don’t need to pay any customs free via UPSshipping. For Switzerland, Norway buyers All parcels usually are shipped by UPSshipping,it will air to France first,then to the destination countries via DPD or UPS. We will pay the tax in the France Custom .there maybe have the second tax fee in your custom . But we will declare a reasonable low value to help buyer reduce it Thedelivery time is usually 8-15 days after dispatch. For American, Canada buyers: All parcels usually are shipped by UPS shipping,it will air tothe USA first,then to the destination cities via UPS or Fedex. Thedelivery time is usually 8-20 days after dispatch. Customers don’t need to pay any customs free. For Malaysia,Thailand,Vietnam,Australia buyers Customers don’t need to pay any customs free. We send by special shipping method, The delivery time is usually5-20 days after dispatch. For Japan,Korea,Singapore,New Zealand buyers We are not responsible for any customs duty/tax if occurs, But we will declare a reasonable low value to help buyer reduce it. For Russian / Belarus buyers: We send by Special Line. And we will pay the tax fee. The delivery time is usually 12-25 days after dispatch. About Guarantee： 1. 12 months Manufacturer`s limited Warranty for defective items (excluding items damaged and/or misused after receipt). Accessories come with a 3-month warranty. 2. Defective items must be reported and returned within the warranty period (and in the original packaging, if possible). You must tell us what the defect is and give us your order number. We do not repalr or eplace items with an expired warranty About Feedback : If you are satisfied with our items, please leave us active feedback and 5 stars. If you have any problems with our items or services, please feel free to contact us first before you leave negative feedback. We will try our best to solve all problems and provide you with the best customer services. Any problem is not a problem, as long as you contact us. 
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