$19.54 – Plug: XT60 Plug, Color: As Shown, Brand: ZOP Power, Name: 11.1V 1800mAh 100C 3S LiPo Battery, Capacity: 1800mAh.
$19.54 – that is current price with coupon for ZOP Power 11.1V 1800mAh 100C 3S RC Battery XT60 (in Banggood). Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Latest coupon and price update (UTC):
Banggood ($19.54)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. Good or bad price? From what I can see this price is higher than average price ($17.17).
Link: Banggood product page
Price: $19.54
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGToys8, BGMatt2022, BG589b2e
(probably won’t work, but you can try them out)
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.
Price history and price alert
Price history (for all/most countries) for ZOP Power 11.1V 1800mAh 100C 3S RC Battery XT60 is here. The lowest price was: $13.99.
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)).