Input voltage: DC12V, fast charging): 1.33mA, Input current: max 1.35A, fast charge): max 1.35A, Output current: 800mA, fast charging): 15V, Output voltage (max, Material: PC, Output voltage: 12V, fast charge): 20V, Compatibility: mobile devices that meet the Qi wireless charging standard, Output current (max, Input current (max, 20W wireless charger, Input voltage (max.
Just check coupons out (with price alert and history). 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 China. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
1. ($30.99): 13f142
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): 502C6B, wirmik, esbgqi20w, TTxBG10, w20qiwi, aff7off, BGmipqi, BGqiwd, BGwirqi, BG2QIBP, BGPL20W, 2019SPEDM, BGXM20W, BG2qibp, BG3CSUM, BGmiqihc, bgssaff9, BGgrf1499, AFfbG10, Bgmiqi82, BGwirqi9, BG13thpl20w, BGqiw92, BGmiqic9, BG20qiwls, BGqi20mi, BGmiqi11, BG20WMI1, BGBFAFF2019, BGCITYADS2019, BGmi20wq, BGmi20w29, BG20wmiqi17, BG20wqihc, BGmi20wq1, 0e7f33, BGFCHRA, BGMWC30W, FBCOUPON1, bGhOnEy10, BGXM2W, BGXMI15, BGdragonBoat, BGSS10%SW, BGXiaomi20W, BGAFF10OFF, bgshOOp10, BGXiaomi20WAU, BgoFErTaSchInA10, BGHU0036, BgcLuBofErtA10, BGXiaomi10BRCN, BGXiaomi20WPadCZ, BGXiaomi20WPadCN, BG20CHARGER, BGMBCBLE, BG670eb1, BGHONEY2110, BG4b0090, BGf3ffc5, BG707d3a, BG8ee860
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Xiaomi 20W Wireless Charger [EU] ($-3)
Price history and price alert
Price history (for all/most countries) for Xiaomi 20W Wireless Charger is here. The lowest price was: $14.99.
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)).