Just check coupons out (with price alert and history). You probably want to know what is the best price?
Maximum charging electric power: 100W, Battery weight: 375g, Flight time: up to 23 minutes, Energy: 68.4Wh, For DJI Phantom 3 RC Quadcopter, Operating Temperature: 0°C to 40°C, Battery Type: LiPo 4S, Capacity: 4500mAh, Voltage: 15.2V
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
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4500mAh 15.2V 4S Intelligent Flight LiPo Battery For DJI Phantom 3 SE Professional Advanced Standard RC Drone | $61.11 | – |
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($76.17): BGRCParts8
2. ($76.17): MVC8SPRING
put item in your cart and apply coupon code there 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): 502C6B, TTxBG10, BGss9%rc, bgssaff9, AFfbG10, affbg10, BGDJIB15, BGBFAFF2019, BGCITYADS2019, BGVDay10%off, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgshOOp10, BGRC902, BgoFErTaSchInA10, BgcLuBofErtA10, BGCuponation10, BGDAVIS, BGHONEY2110, Parts8, BGquadpart, BG1efeb0
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Here is price history (for all/most countries) for 4500mAh 15.2V 4S RC Battery For DJI Phantom 3.
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)).