The Oasis internal battery is 1/6th the size of the Voyage battery. I think I remember that correctly although it's been a while. A lithium polymer battery is typically good for 500 to 1,000 full charges. Devices with similar power draw will wear out a small battery by using up it's charges more quickly than devices with large batteries.
From that it's a safe bet that the overall lifetime of the Oasis will be about 1/6 that of the Voyage. The fact that the Oasis has a cover that contains a charger isn't part of this calculation. From what I've read it's probably not that difficult to replace the Oasis battery so it might not be quite as bad as it seems.
I've pointed this out to a number of people who were considering buying an Oasis and most bought it anyway. Those who explained said they just don't care. They want that form factor, regardless. I agree that that's perfectly reasonable although it's not the choice I've made.
I haven't seen an Oasis. I've just read reviews and seen video reviews and I'm pretty sure I'd like it. But I'd worry about the battery and that's why I don't have one.
Barry
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