I'm so sad I couldn't get my hands on that Psion-like keyboard for it.
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a benefit of the keyboard case is the battery it has that extends the phone's battery, which is nice, but it's an odd setup too. the charge controller on it was originally designed for a power bank and seems like a bit of a crude solution that's lead to multiple issues, like how you could damage the phone having it plugged into USB while the keyboard case is connected. it's slow to charge too, often it can't even keep up with the phone during use.