My Bluetooth speakerphone, a bargain-basement model to begin with, has never been good about battery management. If it's not charged for a while, it'll start making "bloop?" noises at random times, which I suppose is meant to be the low-battery indication. Then, once I've decided to charge it, it turns out to be finicky about the charger; plug it one of the cheap two-hole chargers that I can use for just about anything else, and it apparently doesn't charge, though there's no real indication as to what it thinks it's doing.
Anyway, today it developed a new annoyance. It made the "pling!" noise that it makes when the switch is turned to the OFF position... and, apparently, turned itself off. Turning the switch OFF and back ON woke it back up, but then, several minutes later, it did the same thing again.
I don't feel like trying to fix it, given that the slightly upmarket model now costs $20 (plus another $6 to get it delivered tomorrow instead of the day after), so I've ordered the better one. Apparently the new one, instead of randomly making "bloop?" noises when the battery is low, will randomly announce "Hey, the battery is 37% charged!", or something to that effect. Anyway, more informative.
Now, here's a crazy thought: why don't Bluetooth speakerphones have some protocol whereby the phone could read the status digitally, and then an app on the phone could report things like battery state, whether it likes the charger, and so on? Maybe the app could even be used for fiddling with settings, instead of having just the buttons on the speakerphone and some non-obvious way of using them for setup.
Update: The new one seems pretty decent, though I haven't actually received any calls in the car, so I haven't tested the essential speaker-phone-ness of it. Gotta figure out how to disable what I assume to be alerts for going in and out of coverage: bloop, bloop (I have the "play a tone when this happens" turned off on the phone, but the speakerphone seems to be making its own sound for the event). When I switch it off, it emits a two-note sequence which is distractingly the first two notes of the Helston Furry, and I keep expecting Morris dancers.