Doesn't work in case of power failure. Oops. Better have a backup. And they look cheap. Lots of plastic. Haven't used them yet, that's all I can say for now. 12/29/19: Finally got around to installing them. Hmmm? Normally I'm hooked on locking everything up. However, this time I didn't have enough charger and all four batteries for the PDA. Hmmm? Now I got them back in January so I don't remember packing them, it's just that I was very busy and in a hurry to get everything done. But probably my fault. You can just delay the setup like I did.
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