Basically copy coupon, view price history or create e-mail price alert. What is best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
2-4pcs For Feiyu Tech Fy G5 / SPG / SPGLive Handheld Gimbal Pointed Top 3.7V 22650 Rechargeable Li-ion Battery | $41.18 | – |
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Battery Capacity: 3000mAh, Suitable: Feiyu G5 /SUMMON/ SPG/SPG Live/ SPG Plus Gimbal, Battery Type: 22650, Battery Voltage: 3.7V
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($12.84): bGhOnEy10
2. ($12.84): BGSS10%SW
3. ($13.13): Parts8
4. ($13.13): BGBC1
this code has to be applied in your cart 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, Charger12, BG9NY, BGOTC21, BG10BC, BGRCBC7
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Feiyu Tech 22650 3000mAh 3.7V Battery.
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)).