$21.84 – Weight: 13.2g, Battery Parameter: URUAV 3.8V 550mAh 80C/160C 1S HV 4.35V Lipo Battery, Plug: PH2.0 Plug, Colors: Standard Colors, Size: 7.5*17*63mm, Continuous Discharge Rate: 80C/160C, Capacity: 550mAh.
You can get 5 pcs. URUAV 3.8V 550mAh 80C/160C 1S HV 4.35V PH2.0 RC Battery for $21.84 using coupon code (in Banggood). Go down and check coupons out. Remember to check price history if it is available. You probably want to know what is the best price?
Latest price update (UTC time):
Banggood ($21.84)
Banggood warehouse is located in China. I can’t find any active coupons for this product in Banggood. Low/high price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $19.71)
Link: Banggood product page
Price: $21.84
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGe618d1, 8wEbgaInS5, BG8RCToy, BGToys1, BGRCParts8, Cuponation9, 9OFFSUMMER, BGMatt2022, BG71361c, BGToys8
(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
Check out price history chart (for all/most countries) for 5 pcs. URUAV 3.8V 550mAh 80C/160C 1S HV 4.35V PH2.0 RC Battery. 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)).