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If the jump starter is fully charged when you put off the charger ? before you use the jump starter , make sure it's battery is fully charged . If the battery status light ( the last two LED light ) shows green , The jump starter is fully charged, and still nothing is working , it means the jump starter is bad and y… see more If the jump starter is fully charged when you put off the charger ? before you use the jump starter , make sure it's battery is fully charged . If the battery status light ( the last two LED light ) shows green , The jump starter is fully charged, and still nothing is working , it means the jump starter is bad and you can contact us for replacement or refund . see less If the jump starter is fully charged when you put off the charger ? before you use the jump starter , make sure it's battery is fully charged . If the battery status light ( the last two LED light ) shows green , The jump starter is fully charged, and still nothing is working , it means the jump starter is bad and you can contact us for replacement or refund .
International Power
Seller · April 29, 2019
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We don't recommend this Jump starter being used in medical equipments . Usually the medical equipment has a higher requirement for the power source . The AC outlet of our jump starter generate modified sine wave . For medical equipment , it's better to choose pure sine wave electricity .
International Power
Seller · April 17, 2019
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Hello :

For the warranty , Simply speaking, 1. Kinverch provides a 18 months warranty that is processed in the most hassle-free way possible. 2.Undamaged products may be returned for a full refund for any reason within 30 days of purchasing . 3. For non-quality related warranty claims, buyer is responsible for ship… see more
Hello :

For the warranty , Simply speaking, 1. Kinverch provides a 18 months warranty that is processed in the most hassle-free way possible. 2.Undamaged products may be returned for a full refund for any reason within 30 days of purchasing . 3. For non-quality related warranty claims, buyer is responsible for shipping costs. 4. How to process your claim                                                         
Please contact us by email on Amazon platform directly . Please remember to provide your proof of purchase ( usually order number or invoice ) , reason for replacement or refund , visible proof for defective item when you submit your claim with us . We will process your claim ASAP once receiving your email . 

Thanks & Best regards see less
Hello :

For the warranty , Simply speaking, 1. Kinverch provides a 18 months warranty that is processed in the most hassle-free way possible. 2.Undamaged products may be returned for a full refund for any reason within 30 days of purchasing . 3. For non-quality related warranty claims, buyer is responsible for shipping costs. 4. How to process your claim                                                         
Please contact us by email on Amazon platform directly . Please remember to provide your proof of purchase ( usually order number or invoice ) , reason for replacement or refund , visible proof for defective item when you submit your claim with us . We will process your claim ASAP once receiving your email . 

Thanks & Best regards

International Power
Seller · April 22, 2019
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Mine stays on yellow all the time for maintenance charge.
Jack
· August 8, 2019
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if the battery is not frequently used , please recharge it each two months.
International Power
Seller · April 8, 2019
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Answer:
no
jcs
· May 17, 2019
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No. It's not dual voltage . The Inverter voltage is 115V+/-10% .
International Power
Seller · July 1, 2019
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No, We don't suggest keep the charger in outlet at all times . After the last Led light turn greeen and the battery fully charged , Please take the charger out from outlet .
International Power
Seller · May 6, 2019
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Doesn't sound right. I received mine pretty much fully charged, you may want to contact the seller.
jcs
· April 30, 2019
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Yes , It has comes with two charger : AC charger and cigarette charger .
International Power
Seller · May 6, 2019