$7.41 – 10W Solar Panel with Clips (Banggood, Aliexpress: Color Black, Occasion Outdoor / Camping / Garden / etc, Operating temperature 0 to +60°C, Size 110x136mm, Application Lamp / Fan / Pump / etc, Material Polycrystalline Silicon, Open circuit voltage 13.5V, Working voltage 12V(Can be used to charge 3.7V battery) (the best price with coupon)).
When I was updating this page the price was $7.41 for 10W Solar Panel with Clips (in Banggood). Go down and check coupons out. Remember to check price history if it is available. Best price?
Latest coupon code price check (UTC time):
Banggood ($7.41)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. Isn’t it too expensive? It’s a good price, isn’t it? The average is $8.34.
Link: Banggood product page
Price: $7.41
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): Cuponation9, BG073996, BG00c906, BG27e678, Sports23q1, BG8a75a2, BGdd450a, BG3e4f8c, BG589b2e, BGc28268, BG9dce6b
(I don’t think these’re gonna work, but you can try ’em out anyway)
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 10W Solar Panel with Clips. The lowest price was: $6.98.
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)).