GOAL ZERO® Extreme™ 350 Power Pack
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- Charge a variety of devices
- Powers laptop for an additional 10 hours
- Powers cell phones for 350+ hours
- Recharge an iPad® up to 15 times
- Long-lasting 350 watt-hour power pack
- Daisy chain additional Power Packs together for more power
- Rechargeable AGM battery; 500-800 cycles
- Leave plugged in at home or cabin for emergency back-up power
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I tested it here at home and it ran for 6 hours without a problem. The battery was still at 40% charged when I stopped. So the following day would need to have good sun and also follow sun for optimal charging.
There is no indicator to show you if it is getting optimal charging rate from the 30 watt panel or not though, so measuring is a challenge.