Weight After Packaging 295G (Subject To The Actual Product), Wire Length About 3M, Plate Weight About 193G (Subject To The Actual Product), Size 175 * 115 * 10Mm, Material Grade A Monocrystalline Silicon Solar Panel, Short Circuit Voltage 6.2V, Package Size 200 * 128 * 73Mm (White High-Grade Neutral Box), Working Voltage 5V (Charging 3V-5V Battery), Short Circuit Current 750Ma, Interface Micro USB (Android), Power 4W, Working Current 0-800Ma.
Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
4W 5V Monocrystalline Silicon Solar Panel Charger with Micro USB for Outdoor Home Security Camera Doorbell Power Supply | $17.88 | – |
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. There is one great coupon!
Link: Banggood product page
1. ($22.49): BGAMMT03
coupon code has to be applied in shop’s 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/i1u
Old coupons (from the oldest to the newest): BGa46747, BGCarEle4, BGissam740, BGSCM11, BGCarEle5, BGLMQ15
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Here is price history (for all/most countries) for 4W 5V Solar Panel Charger Micro USB. The lowest price was: $12.99.
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)).