The technical sheet is misleading: You can't charge this work light from the built in USB port! It comes with a 4.2V wall charger, you have to use that to charge the lamp. And for that, you have to use a travel adaptor! The USB port is only to charge other USB chargeable items from the lamp's battery. I needed a work lamp what I can charge from the USB connector in my car. I'm disappointed. In the other hand, it's definitely not a 500W lamp, and doesn't emit 3000lm. I have several light to compare, this is not even close to 3000lm. Doesn't look very durable either. Over all, I'm sorry I bought this lamp, I could spend my money better.

The technical sheet is misleading: You can't charge this work light from the built in USB port! It comes with a 4.2V wall charger, you have to use that to charge the lamp. And for that, you have to use a travel adaptor! The USB port is only to charge other USB chargeable items from the lamp's battery. I needed a work lamp what I can charge from the USB connector in my car. I'm disappointed. In the other hand, it's definitely not a 500W lamp, and doesn't emit 3000lm. I have several light to compare, this is not even close to 3000lm. Doesn't look very durable either. Over all, I'm sorry I bought this lamp, I could spend my money better.

The technical sheet is misleading: You can't charge this work light from the built in USB port! It comes with a 4.2V wall charger, you have to use that to charge the lamp. And for that, you have to use a travel adaptor! The USB port is only to charge other USB chargeable items from the lamp's battery. I needed a work lamp what I can charge from the USB connector in my car. I'm disappointed. In the other hand, it's definitely not a 500W lamp, and doesn't emit 3000lm. I have several light to compare, this is not even close to 3000lm. Doesn't look very durable either. Over all, I'm sorry I bought this lamp, I could spend my money better.

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