Feature:1. High efficiency, low energy consumption, fast charging, saving time and effort.2. With a charging indicator, you can keep track of the state of charge.3. Made of high quality plastic material, it has good insulation and is safe to use.4. Portable charger, small size, light weight and easy to carry.5. 36V 20AH 2.5A current output, the charger is suitable for electric bicycles.Specification:Item Type: ChargerCondition: 100% Brand NewColor: As picture shownMaterial: PlasticInstructions:1. Determine if the charger output voltage and polarity and the battery rated voltage and polarity match;2. Please insert the battery box plug first, then plug in the AC power supply. After charging is complete, first pull the AC power plug;3. When charging, the charging indicator shows red, indicating normal charging;4. When charging is complete, the indicator shows green. (At full load, the full charge indicator also shows green).Package List:Charger x 1Note:1. Make sure that the charger output is the same as the battery pack, otherwise it will damage the charger and battery pack!2. Make sure it is a rechargeable battery and matches the charger's specifications. Do not charge non-rechargeable batteries!3. The charger will emit heat when it is used. It must be kept in a good ventilation environment and should not be close to the surface of flammable or explosive materials such as sofas, beds, carpets, etc. Do not use in wet or drenched areas.4. The charger is strictly prohibited from being vibrated and should not be carried inside the rut, as vibration may damage the internal components, so damage is not guaranteed.5. Do not play when charging, to prevent electric shock.6. If the power cord is damaged, it must be replaced by the manufacturer or its maintenance department and similar full-time personnel to avoid danger.7. This charger is only for electric vehicles and cannot be used for other purposes.8. There is high voltage in the charger. Non-professionals are not allowed to open. If open or repair without authorization, we do not provide after-sales service.9. If the charger has not been turned green for more than 12 hours, and the battery is fully charged, please disconnect the charger and the battery to avoid damaging the battery.