I am monitoring price for FIMI X8 SE RC Battery 11.4V 4500mAh and it is for $86.99 now (in Banggood). You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
51.3Wh, Weight: 273g, Size: 103x 38x 67mm, Max Charge Voltage: 13.05V, Nominal Voltage: 11.4V, Flight Time (no wind): About 33mins, Usage: For FIMI X8SE RC Quacopter, Rated Capacity: 4500mAh, Model: DC02A5, Appliable Model: FMWRJ02A5
Latest coupon code price check (UTC time):
Banggood ($86.99)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. Is it cheap? From what I can see this price is higher than average price ($78.98).
Link: Banggood product page
Price: $86.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGXMDXMFM8SEB, bgssaff9, BGFIMIX8B, BGFIMIX8BA, BGX8BATTERY, AFfbG10, BGX8SE20BA, BGdragonBoat, BGSS10%SW, BGX8SEBR, BGX8SETTY, BGAFF10OFF, BgcLuBofErtA10, BGX8SEBRQ, bGhOnEy10, BGFIMIX8B11, BGBAX8SE, BGCZX8BA, BGHONEY2110, BG339366, BG1fa26a, BGf6bed8, BG784224, BG1c0f57, BG915b5d, 8BGwbg2204, BG07e94a, BG04bc01, hoNEYbGdeAlS, BGRCT10, BGJUNEGSG9, BG6f120d, BG8ReviTrage, Cuponation9, BgGoodie9, BGMatt2022, BGGutscheine, BGToys8, ADMITADBLACK, BG8OFFCOUPON, TTBLACK5, BGBFDAY8, BGSPRING8OFF, BGHONEYSP, BGESJY8
(there’s a little possibility that old coupon will work)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for FIMI X8 SE RC Battery 11.4V 4500mAh.
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)).