Model Description : 48V eBike Battery Pack - (4) 12V 20Ah (6-DZM-20) Compatibility : eBikes that use a 48V Sealed Lead Acid Battery Pack Condition : Brand New, Fresh Stock Includes : (4) 12V 20Ah 6-DZM-20 eBike Batteries (Deep Cycle) Warranty : 1 year full warranty included, additional warranty is available Life time expectancy : 3-5 years Manufacturer : UPS Battery Center Ltd. The 48V ebike battery pack consists of high quality, deep cycle, rechargeable sealed lead acid batteres. These batteries are  designed for mobility devices such as ebikes and mobility devices. When wiring these batteries into your battery tray, please make sure to wire them in the exact same way as you found them. Replace any corroded wiring and terminals. Make sure the connections are tight and secure. These batteries are new and arrive fully charged. Be careful not to short the batteries when installing. Our batteries are new and always fresh stock. The 48V eBike battery set is covered by our industry leading 1 year replacement warranty. Extended warranty of up to 3 years is available for your convenience. Our warranty is inclusive of shipping costs and is hassle free, the only warranty of this kind in the marketplace. Physical Dimensions of Each Battery in the 48V set: Nominal Voltage: 12V Nominal Capacity: 20Ah Terminal Type: Threaded Insert (screws included) Weight: 15 lbs Length: 7.13" (181 mm) Width: 3.03" (77 mm) Height: 6.57" (167 mm)