Go down and check coupons out. Remember to check price history if it is available. Do you want to know what the best price is?
Battery High Energy Lithium Battery, Color Black, Stroke 12mm, Chaging Time 90 Min, Weight 1.04kg/2.40kg(Includes Charger And Packaging), Rated Input 100-240V~50/60Hz / 25W, Battery Capacity 2000mAh, Model Booster Pro 2, Working Time 3.5-4 Hrs, Sound Pressure Level 70 dB(A), Power 135W Max., Rated Output 25V/1A, Sound Power 78 dB(A), Rated Voltage 24V DC, Unloaded Speed 1800-3400/Min Max., Size 200*60*285mm, Material ABS
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. There is one coupon right now! Check this out.
Link: Banggood product page
1. ($176.63): BGCAPITALOS8
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGHB218, BG22f7a1, tRaDetRaCKeR, BGHECARE1, BG4ee866, BGHOM095, Cuponation9, BG75597c, BGd831c9, BG589b2e, JanBGCoupon8, BGSaleFeb8, BGSaleAD, BGMARCHSALE, BGAUGUST8
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Price history (for all/most countries) for Booster Pro 2 Deep Tissue Muscle Massager is here.
Price records source(s): 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)).