Voltage rating: 3.7V, Power rating: 2W, Waterproof rating: IPX7 (toothbrush and charging dock), Charging time: more than 12h, Battery: 700mAh Li-ion battery.
Get coupons, create price alert or check price history out! Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in Hong Kong.
Link: Banggood product page
1. ($20.99): BGb99492
2. ($45.50): Cuponation9
3. ($46.00): BG8ReviTrage
4. ($47.00): BG00c906
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): 502C6B, vipupgrade8, e78b34, 429469, TTxBG10, BGNew11, 2019SPEDM, BGMITO34, AFfbG10, BGMIBRUSH, BGMIJIATT, BGOE31, BGBFAFF2019, BGCITYADS2019, BGBGHFRI15, BGJIAMI32, BGOERTGN, BGVDay10%off, BGAFF10OFF, bGhOnEy10, BGHFNE39, BGdragonBoat, bgshOOp10, BgoFErTaSchInA10, BgcLuBofErtA10, BGZSDHWK34, BGBLACKFHK34, BGXIAOMITB34, BGCuponation10, 13f142, BGHONEY2110, BG10OFFAFF, BGwhielabel, BGMAR3109, BGJUN151, BG10OFFAFF1, BGISXP2704, BANGGOODSD, 6GSGIT, BGHealth06, 00c906, BGHealth10D, 2022ACTIESNL, BGHB218, BGXPMA310, BGXPAP247, BGXPMA035, tRaDetRaCKeR, BGHECARE1, BG4ee866, BGHOM013, BGd035dd, BG53ae9e, BGcefd0e, BG6038d2
(there’s a little possibility that old coupon will work)
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi DDYS01SKS Sonic Electric Toothbrush? There we go. The lowest price was: $20.99.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).