
Philips Sonicare
ProtectiveClean 4100
Affordable, durable, great clean; strong vibration and magnet issues.

Running these analyses costs money. Buy through my links to help keep lights on! I may get a small commission.
I got this one Aquasonic Vibe Series... https://www.amazon.com/dp/B0C1CYX2CT?ref=ppx\_pop\_mob\_ap\_share specifically for travel about two years ago. I use it but ugh. The case is so obnoxiously big and the case has no option to plug it in for charging. Even when fully charged, the vibration is pretty weak. I have a Sonicare that I love for at home use and always wish I had that instead, but it didn’t come with a case. Ages ago I had a Sonicare that have an unattractive but fairly streamlined white case that had a direct plug in for charging. These days I always eye the simple manual toothbrush and wish I could convince myself to travel with one of those instead. But I am one of those who wants to water floss, manual floss, and brush with an electric toothbrush every night. Have not found a good solution.
I use and love the Aquasonic Vibe. I paid about $35 for it. It comes with 8 replacement heads, a travel case, 4 cleaning modes, and warranty. It also times your brushing in 30 second increments for each part of your mouth. The replacement heads are $30 for 8 but I won't need to buy more for a long time (the company says it is 2 years worth that comes with the toothbrush initially) so i thought that was do able. I finally bought mine after my best friend bought his last year and recommended. I wish I would've have gotten one sooner. I personally like it better than my Phillips Sonicare and I used that thing for the last 15 years.
I bought an auquasonic black series electric off amazon for like 40$ I'm pretty happy with it.
I use an Aquasonic Black Series and I like it a lot. Plenty of power but it’s big for travel. Uses their own wireless charger but I don’t know how long a charge lasts - more than a month.
Aquasonic black. Inexpensive, comes with 8 replacement heads and a travel case. Battery lasts for a month per charge. At least
Been loving my aquasonic black. You don't have to buy a charging brick, battery lasts for over a month in a single charge, it comes with 8 heads and a traveling case, and has more oscillations per minute than the sonicare 4100. I believe it's also cheaper than the 4100 right now.
I've gone through a few electric toothbrushes over the years so I'll share what I've learned the hard way. Right now I use an AquaSonic and my wife uses the Oral-B round clean. Both work great but the difference in battery life is real. I charge mine maybe twice a month, overnight each time. My wife charges hers three or four times a month. That doesn't sound like a big deal until you travel and forget the charger. The AquaSonic just lasts longer between charges and that's been a bigger quality of life thing than I expected. To answer the actual question, yes it's a frugal investment. But not because of the toothbrush itself. It's the replacement heads. That's where the real cost adds up over time. The name brand Oral-B heads are expensive. The AquaSonic heads are way cheaper per pack. So when you're comparing toothbrushes, stop looking at the upfront price and start looking at what the heads cost for a year. That's your actual recurring expense. The dentist in this thread is right that entry level is fine. You don't need the $300 model with six modes you'll never use. Get something in the $30 to $50 range with cheap replacement heads and you're set. The money you save on not needing fillings and deep cleanings pays for itself pretty fast. One thing nobody here mentioned. Wait for a sale. These things go on deep discount during Prime Day and Black Friday every year. I've seen the Oral-B models drop 40 to 50 percent. No reason to pay full price.

Philips Sonicare
ProtectiveClean 4100
Affordable, durable, great clean; strong vibration and magnet issues.

Philips Sonicare
4100 Series
Affordable, durable, great clean; some find vibration unpleasant.

Oral-B
Pro 1000
Affordable, effective rotating clean, but loud with poor battery.

Oral-B
iO 3 Black Electric Toothbrush
Exceptional clean, gentle, but mold-prone with pricey heads.

Philips Sonicare
ProtectiveClean 6100
Gentle, advanced clean, good value, but bulky travel case.

Ranked #1
Autobrush - Sonic Pro Electric Toothbrush

Ranked #1
Philips Sonicare - Philips One Rechargeable Toothbrush

Ranked #1
Oral-B - Pro 1000

Ranked #1
Philips Sonicare - ProtectiveClean 5300 Sonic electric toothbrush

Ranked #1
Oral-B - iO 3 Black Electric Toothbrush

Ranked #1
Oral-B - iO 3 Black Electric Toothbrush