You can create price alert here, copy coupons and view price history. Do you want to know what the best price is?
Ni-XX Cell Count: 1~15s, Balance Current Drain: 200mAh/cell, Weight: 1211g, Cooling: Dual Fan, Charge Current Range: 0.1~20.0A, Discharge Power: 2x25watt, Charging Output: 2x 400w (800W Total), Dimensions: 200x140x55mm, Input Voltage: 12~18v DC, Li-XX Cell Count: 1~6s, Pb Battery Voltage: 2~20v, Intelligent Temp Control: Yes, Battery Setup Memories: 10, Discharge Current: 0.1~5.0A
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
SKYRC DC 12-18 Volts Extreme 400W 20A DC Battery Balance Charger Discharger | $98.38 | – |
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.
Link: Banggood product page
1. ($92.43): BGGAL8
2. ($92.43): BGRCParts8
apply code in your basket (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): Charger12, 502C6B, PU15, pu15, AFfbG10, BGBFAFF2019, BGCITYADS2019, BG10BC, BGMPB2020, BGAFF10OFF, bGhOnEy10, BGBC1, BGdragonBoat, BGRCBC7, BGSS10%SW, bgshOOp10, BGRC902, BgoFErTaSchInA10, BgcLuBofErtA10, BGCuponation10, BGBCSpring1, BGDAVIS, BGHONEY2110, Parts8, BGRCBC11, BGSFBC1
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for SkyRC Extreme 400WX2 20A RC Battery Charger? There we go.
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)).