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I did this with my razor too, by plugging in an 18650 in a place of an AA.

Now? A 15 min job turned in a 5 min job because of how powerful it is.

It now pushes 2A instead of 1.3A, at a higher voltage too. It also has higher capacity too, so that is a plus.

I would not try putting cells in series though. Way too dangerous.

:laughing:

My Sonicare toothbrush has an inaccessible li-ion cell. Its most likely an 18650 cell. Too bad I can’t swap it out for a fresh one when its time is up.

Edit: I was wrong. It is actually a 14500 cell. It requires resoldering to swap out. PITA!

Did you get inside or find info online or something?

I tried to put new batteries in an old Sonicare with NiCads. Had to break open the case. The 2 batteries were mega-epoxied in. No way to change them.

Yes, I found a video.

Had a cast on my strong hand for awhile…can’t imagine using an enhanced toothbrush in my offhand…

(let alone the toilet paper fiasco)

No more difficult than using a manual toothbrush. I think the electric one may actually be easier.

I used to have an Oral-B one in the past. The Sonicare diamondclean is way better, IMO.

@chinooker, I would advise you to try an electric razor that is usually powered by AAs with 14500s.

That will blow up away.

Don’t try turbocharging a bidet with a waterjet…

Or your g/f’s vibrator… she might leave you for good.

Of course, don’t use 14500s in series, that would be just dangerous.

My Sonic care has stupid low frequency PWM …of course …it follows me :stuck_out_tongue:

I used to replace batteries in rechargeable items like cordless razors and stuff.

Usually a pair of NiCd cells. Occasionally NiMh. The fun ones had LiFePO4, but the place I worked didn't carry replacements for those. Would have been easy enough to do, though.