Balanced Cells: 6S, USB Output: 5V/1A, Input Voltage Range: DC 10~27V, Package weight: 90g, Product size (Lx Wx H): 78X55X18mm, Model: H605, Output Current Range: 0.1~5.0A, Maximum Charge Current: 5A, Balance Current: 250mA, Output Voltage Range: 0.5~28V, Max Charge Capacity: 50W, Package size (Lx Wx H): 90X65X25mm, Product weight: 68g.
You can create price alert here, copy coupons and view price history. 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:
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
1. ($35.05): BGGAL8
coupon code has to be applied in shop’s cart 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): BGSKUA73500, BGH6051, AFfbG10, BGBFAFF2019, BGCITYADS2019, BGH605, BGVDay10%off, 0e7f33, BG10BC, BGAFF10OFF, bGhOnEy10, BGISDTH605, BGBC1, BGdragonBoat, BGSS10%SW, bgshOOp10, BGRC902, BgoFErTaSchInA10, BgcLuBofErtA10, BGCuponation10, BGBCSpring1, BGDAVIS, BGHONEY2110, Parts8, BGRCBC11
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for ISDT H605 Air 50W 5A 2S-6S RC Battery Charger. The lowest price was: $23.99.
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)).