Multiple Choices 24v 10ah 24v 20ah36v 8ah 36v 12ah 36v 20ah 48v 12ah 48v 20ah 48v 30ah52V 30ah Strong Packing and Fast Delivery To avoid battery damage by courier, our batteries are packed in cardboard cases with rigid foam. Make sure you receive a battery in good condition. We usually use fedex or usps to deliver your package. Our batteries can be delivered to you in 2-3 days at the soonest. Extreme weather and remote areas require longer delivery times. We recommend that you keep the original package. If you want to return the battery, you need to use the original package. Premium Battery Chip 24V 10AH:7 series 4 parallel.24V 20AH:7 series 6 parallel.36V 8AH:10 series 3 parallel.36v 12AH:10 series 4 parallel.36V 20AH:10 series 6 parallel.48V 12AH:13 series 4 parallel.48V 20AH:13 series 6 parallel.48V 30AH:13 series 6 parallel.52v 30AH:14 series 6 parallel. Our ebike battery is automobile-grade battery and has a long service life. Each cell has a cycle life of more than 500-1000times, which is more than twice that of ordinary batteries. High Performance, high safety, inexplosive, incombustible; Non-toxic, pollution-free, through the RoHS certification. The battery chip has no memory effect and does not have to empty the remaining charge before charging, which is convenient to use. Lithium ion Battery Charger We have equipped professional electric bike charger for our ebike battery. Please do not use substandard or incompatible battery charger. It will damage the battery. AC100-240V, 50/60HZ, 2.5A. Output: DC42V, .Female DC interface (outside diameter of 5.5 mm; inner diameter of 2.1 mm)for 36v battery.AC100-240V, 50/60HZ, 2.5A. Output: DC54.6V, .Female DC interface (outside diameter of 5.5 mm; inner diameter of 2.1 mm)for 48v battery.54.6v 2A/4A XLR charger for 48v 30ah battery. 58.8v 2A/4A XLR charger for 52v 30ah battery. Warning 2A charger means 1 hour can charge 2A to battery. If you battery is 8A. It takes 4 hours to charge the battery in full.( 8/2=4 )4A charger means 1 hour can charge 4A to battery. If you battery is 20A. It takes 5 hours to charge the battery in full.( 20/4=5 )Please remember to cut off the power when you charger's light turns green. It means that you battery is fully charged. Battery's light shows red when the battery is charging. Battery Size and Battery Weight 48v 30ah:11.73*6.1*3.07 inch 6.2Kg 13.66lb (48v motor) Full voltage:54.6V52v 30ah: 12.59*6.1*3.07 inch 6.7Kg 14.77lb (48v / 52motor) Full voltage:58.8V36V 8ah: 7.79*2.76*2.76 inch 1.7kg 3.74lb (36v motor) Full voltage:42V36V 12ah: 7.79*3.74*2.76inch 2.1kg 4.62lb (36v motor) Full voltage:42V 36V 20ah: 8.19*4.72*2.76inch 3.2kg 7.05lb (36v motor) Full voltage:42V48v 12ah: 10.04*3.74*2.76inch 2.7kg 5.95lb (48v motor)Full voltage:54.6V48v 20ah: 10.47*4.72*2.76inch 3.8kg 8.37lb (48v motor)Full voltage:54.6V24v 10ah:5.69*3.74*2.76inch 1.4kg 3.08lb (24v motor)Full voltage:29.4V24v 20ah:6.29*4.72*2.75inch 2.2kg 4.05lb (24v motor)Full voltage:29.4V Troubleshooting and detailed user instructions 1.If you bought 48v, so the battery is only suitable for electric vehicles with 48v motors, 36v can not be used. If you bought 36v, the battery is only suitable for electric vehicles with 36v motors, 48v can not be used. If you bought 52v, the battery is suitable for electric vehicles with 52v motors and 48v motor. 2. If the wattage of the motor is too big, the battery will not be able to be used, and the performance is not good.3.Please confirm the size before you buy the battery . Returns due to inappropriate sizes are not the seller's problem.4.The plug of the battery is XT60 connector. If your bike is not Xt60 plug, please don't buy it. Otherwise, battery will not work. 5. Please read the item detail page carefully before purchasing.6.If the lithium battery cannot be charged properly. This may be caused by improper or faulty connection of the charger, the protection board is not restored to its normal state, and the battery pack is short-circuited with external appliances. We need to check whether the charger is connected correctly, whether the positive and negative plugs of the battery pack charging are reversed, and try to restart the appliances to release the protection status of the protection board. Battery Charging Note 1.Use the charger specified by the manufacturer and make sure that the charger model matches the battery model. 2.A sufficient charge is recommended for the first charge to ensure optimal activation of the battery's performance. 3.For daily charging, connect the battery to the charger before turning on the power to avoid electrical sparks.4.Try to avoid charging in high temperature (over 65°C) environment, high temperature will make the battery capacity decline. 5.Charging time should be strictly controlled in summer, charging can be stopped between 90% and 95% to avoid thermal runaway of the battery. Battery maintenance 1.Lithium batteries do not need to be “activated” and have no memory effect, so they can be charged as they are used.2.Avoid charging the battery after each under-voltage, try to implement the strategy of charging as you go.3.When the battery is not used for a long time, it should be disconnected from the vehicle and regularly replenished to avoid self-discharge.4.Prohibit overloading to avoid damage to the protection system.5.When riding, it is recommended to use pedal assist on steep slopes, bad road conditions or in strong windy weather to reduce the burden on the battery and motor. Precautions 1.Waterproof protection: When riding in rainy or snowy weather, pay attention to the protection of the battery interface to avoid short circuit caused by water ingress.2.Safe storage: The battery should be stored in a dry, light-proof place, away from water and fire sources, avoiding strong vibration and collision.3.It is prohibited to disassemble and modify the battery privately, and do not use the battery on mismatched electric vehicles.Precautions1.Prohibit overcharging for more than 24 hours.2.It is prohibited to be idle for too long and not used for a long time.3.It is strictly prohibited to be close to flammable and explosive items when charging.4.When there is serious water on the road in rainy days, be sure to pay attention to the battery not to get into the water, which will lead to the shortening of the life of the battery, and may be seriously short-circuited and scrapped.5.Follow the above guidelines and precautions, you can ensure the safe and efficient use of lithium batteries for electric vehicles, prolonging battery life!