Just check coupons out (with price alert and history). What is best price?
Auto Cutoff Voltag 4.20V +- 0.05V, 1.0A CC current 100mA +- 100mA, CV Cutoff Current <100mA, Input DC 5V 1A, Activation current 50mA - 100mA, Auto Recharge Voltage 4.10V +- 0.10V, Standby current <20mA
Aliexpress
There’re some similar (or not) items on Aliexpress
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. I don’t really know if this price is reasonable, coz there’s no price history in my DB. One coupon is available. Cool!
Link: Banggood product page
1. ($12.87): BG10OFFAFF1
just apply this code 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): BGTORCH, BGAFF10OFF, BgoFErTaSchInA10, 4BLF, BgcLuBofErtA10, BGFLS15, BGHONEY2110, BG10OFFAFF, BGwhielabel
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
There is only one database record (it was for $7.91), so you can’t see price history chart.
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)).