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And once I do finally have a larger panel, I can plug all my different things into it - phone, laptop, lamp, Kindle. Currently I have the lamp and my little battery pack plugged in together on the windowsill during the day to charge in tandem, but the battery pack is even slower than the lamp, so it's likely the lamp is helping the battery if the battery is not full, and the battery is helping the lamp if the lamp is not full. XD Either way - it works.