I got this wand in early January 2023. The BMS PalmPower Extreme. Good range from rumbly lows to buzzy highs without being too buzzy. One of the perks is also incremental speed control. Being able to precisely tune the speed is great.
Reportedly the power rivals the Magic Wand Rechargeable. I would be able to test that first hand instead of second hand except that logistics get in the way.
While my masturbation habits are not really the subject here, the relevant part is that they are embarrassingly infrequent. I like to share resources when feasible, and this is no different.
A partner reported that it died for them during use and they plugged it in. They quickly added that it was not comparable to my experiences of wand power death because they were on round 4 and were content. That reminded me that I'd been meaning to expand my wand collection for exactly that reason. The expansion won't get to me until sometime next week though.
Some time later, I check up on it to put it away. I have a habit of doing a quick motor check and using the travel lock to ensure it doesn't accidentally go off when not in use. No lights, nothing. Plugged in wrong? The charging light turned off super quickly, but it wouldn't charge. It would vibrate a couple of times to indicate dead battery and then stay off.
It's done this before, and it's because it needs to charge via a low amp outlet. So I do that. It charges! 
It powers on, in that the led turns on. The lights blink when incrementing speeds or changing modes, but the motor is still as a river on a quiet winter morning. 
If any of y'all have suggestions, I'm definitely willing to try them. It seems like it's a motor problem, but I can't really say what because it vibrated just fine when doing the pitiful "low power, please charge 🥺" sputtering.