$30.16 – Weight 350g, Operating temperature 0-65℃, Charging interface Built-in power AC power cord: 110-240V 50/60Hz 0.4A (Maz), Charging cut-off current <150mAh, Recharging current 500mA×4;800mA×4;1500mA×2, (Lengthx Widthx Thickness), (1 channel and 4 channel Li-ion), Charger size 165x 105x 38mm / 64.96x 41.34x 14.96inch, External power supply: DC12V 2A, Charging cut-off voltage 4.20±0.05V/4.35±0.05V/3.65V±0.05V/1.48V±0.05V.
You can get Astrolux AC04 Battery Charger for $30.16 using coupon code (in Banggood). You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
Latest coupon and price update (UTC):
Banggood ($30.16)
Banggood warehouse is located in China. Isn’t it too expensive? Well, this price is higher than average price ($18.82) There is one coupon available! Pretty cool, huh?
Link: Banggood product page
Price without coupon: $31.75
1. ($30.16): BGTORCH10
paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): maac4, BGAAC4, BGASTROLUX, BG1128, BGAST25, BGAFF10OFF, BG10OFFAFF1, BANGGOODSD, BGTorch4, BGASTB, BGdeals319, BG343c99, BGXMAS58, BG105bb9, BGtorch7, BGtorch2, BGAlerabatI, BGASTC, BGLED07, BG8FORMULAMX, BGcharles03, BGd57765
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for Astrolux AC04 Battery Charger is here. The lowest price was: $15.69.
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)).