Just check coupons out (with price alert and history). Do you want to know what the best price is?
LED quantity: 4 pieces, Dimensions: 29x 20.5 cm, Material: Acrylic, Battery: Built-in lithium battery, Light Source: LED
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
Batterie Lithium 4.8kWh 48V – US5000 – | $669.12 | – |
 |
Batterie Lithium 4.8kWh 48V – US5000 – | $669.12 | – |
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. Well, there is one coupon available right now.
Link: Banggood product page
1. ($9.85): BGAMMT03
apply it 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): BGSCM75, BG589b2e, BGSCM11, BGCAR639
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Do you need price history chart (for all/most countries) for USB Rechargeable Wool Repair Cap LED Warm Hat? There we go.
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)).