Then it comes to drone racing, pilot always needs the best stuff, one of those things is good battery charger.

Today we gonna see what most valued priced product you can have.

• ISDT D2 dual channel (product link)
• HOTA D6 Pro / D6 Duo Pro (HobbyMate) (product link)
• ISDT Q6 pro/Lite (product link) (lite)
• ToolkitRC M8 (product link)

ISDT D2 dual channel

This is one of the first such powerful and well priced dual channels battery charger. One thing what i would change in it (and maybe will be added later with firmware updates) is auto port select on battery plug in. And more charging types.

ISDT D2 Has 2 fans, and most of the time they don't power on, only then needed.

Separated channel select

Inverted (normal) balance lead connectors

Discount coupon: ISDTD2

Feature:

• Wild rang AC Input,Industrial level power management.
• 200W of Dual Channel output,without interference from each other.
• Unexceptionable performance on the power space ratio.
• Carefully optimized internal structure,dual fan cooling system.
• scOs specially designed for smart charging OS.
• Support Multiple Languages,totally localized.

Description:

• Input Voltage: AC 100-240V
• Charge Current: 0.1-12.0A*2
• Discharge Current: 0.1-3.0A*2
• Max Charge Capacity: 200W
• Max Discharge Capacity: 5W*2
• Balancing Current: 1A/cell*2
• Balance Cells: 2-6S*2
• Supported Batt. Type:
• LiFe/Lilon/LiPo/LiHv (1-6S)
• NiMH/Cd(1-16S)
• Pb(1-12S)
• Display: 2.4〃320×240 IPS LCD
• Operating Temperature: 0-40°C
• Storage Temperature: -20-60°C
• Dimensions: 120x108x70 mm
• Weight: 510g

Manual: Click Here

Package Included:

• 1x ISDT D2 Charger
• 1x AC Input Cable

Get it here: https://api.racer.lt/7tvs with discount coupon: ISDTD2

ISDT PC-4860 1-8S Safe Parallel Board XT60 CNC Parallel Charging Board: https://api.racer.lt/7olf

ISDT FD-100 80W 6A Smart Control Discharger for 2S-8S Lipo Battery: https://api.racer.lt/7tai

Bonus - ISDT BattGo BG-8S Smart Battery Checker Balancer Receiver Signal Tester Quick Charge Function: https://api.racer.lt/7tvr

HOTA D6 Pro / D6 Duo Pro (HobbyMate)

This is better copy of ISDT D2, why copy? as it was released after the D2, but this is a better copy, with more features inside, one of that is wireless phone charger on top that's a great thing for traveling very convenient! (little slow charging).

It has one cooler, and it always stay's ON even when not using it, little annoying, but with that you wont forget to disconnect it from power =) when you not using it.

HOTA D6  Dual Channel Charger w/ Wireless cell phone charging - 2 x 325W DC. This charger doesn't come with balance boards or charging adapters.  Packs must be connected directly to charger via the make XT60 connector and the JST-XH balance connector is connected to the chargers balance port.  We offer the chargers with balance boards and charging adapters. You can find these in the charger section of our site.

D6 DC has all the bells and whistles at a fraction of the price, even wireless induction charging for your mobile devices. High balance discharge current so packs that are not perfectly matched for IR or mAh will charge faster.  

Features:

• Dual Channel Output, Charging Faster  - Highly optimized charging algorithm with efficiency up to 94%, supporting for max. 650W charging and external discharging, single but not simple.   2 x 325W
• Wireless Charging, Put and Charge - The unique wireless charging with patented design, it can be used perfectly for iPhoneX, iPhone8, Samsung S8 and many other mobile devices. 
• Intelligent Upgrade, Fast Experience  - Built-in Micro USB connector for a much more easier and faster firmware upgrade. 
• Compatible with Various Batteries  - The innovative intelligent program fully supports LiHv/LiPo/LiFe/LiIon/Lixx (1~6S)NiZn/Nicd/NiMH(1~16S)Smart Battery (1~6S)Lead Acid(Pb)(2~24V) Enelop(1~16S)
• Safe and Reliable, Easy and Effective  - The most advanced circuit design and charging algorithm ensures a much more reliable charging and discharging no matter at over-voltage, over-current, over-temperature, short circuit and other malfunction warnings ensuring the safety of you and your Lipos. 

Lipos charging rates 325W per channel:

• 1S:  15 Amps
• 2S:  15 Amps
• 3S:  15 Amps
• 4S:  15 Amps
• 5S:  15 Amps
• 6S:  13 Amps

Specification: 

• Model NO.: D6 Pro 
• Input Voltage:  AC100~240V / DC 6.5~30V 
• Charge Current: 0.1~15A * 2 
• Charge Power: DC 325W * 2(650W)  
•                          AC 200W(Support power distribution)
• Discharge Power: Internal discharge:15W * 2(balance port 10W) 
•                              External discharge:325W * 2 
• Battery Type: LiHv/LiPo/LiFe/Lilon/Lixx : 1~6S 
•                       NiZn/Nicd/NiMH : 1~16S 
•                       Smart Battery : 1~6S 
•                       Lead Acid(Pb) : 2~24V 
•                       Enelop : 1~16S 
• Balance Current: 1600mA * 2 
• Discharge Current: 0.1~3A * 2 
• External Discharge Current: 1~15A * 2 
• USB Output: 5V / 2.1A 
• Dimensions: 108×105 ×76mm 
• Net Weight:  555g 

Package Information:

• Package size: 11 * 11 * 9.4cm / 4.4 * 4.4 * 3.6in 
• Package weight: 600g / 1.3lb 
• Gift box package 

Package Included:

• 1XD6 PRO Charger 
• 1XCharger Plug 
• 1XManual 

Get your HOTA/HobbyMate D6 Duo Pro chargers here: https://api.racer.lt/7tcu with discount copon:  25e1dd

ISDT Q6 pro/Lite

This is one of the best really small & light, very powerful charger, what is capable of doing big things. As it's bigger brother D2 it can do all the same things only from DC, up to 15Amps charges!

Specifications:

• Input Voltage: DC 7-32V
• Output Voltage: 0-30V
• Charge Current: 0.1-14.0A
• Discharge Current: 0.1-3.0A
• Max Charge Capacity: 300W
• Max Discharge Capacity: 8W
• Balancing Current: 1A/cell
• Balance Cells: 2-6S
• Supported Batt. Type:
• LiFe/Lilon/LiPo/LiHv (1-6S)
• NiMH/Cd(1-16S)
• Pb(1-12S)
• BattGO Support Smart Battery:Output support
• Display: 2.4〃320×240 IPS LCD
• Operating Temperature: 0-40°C
• Storage Temperature: -20-60°C
• Dimensions: 80x80x33.5 mm
• Weight: 119g
   

Feature:

• Double up the power capacity, and lighter.New ISDT Q6 Pro with rounded edge design easily stows in bag or pocket. Same size as the SC-608 charger with twice the power capacity.
• The ISDT Q6 Pro come with 2.4″ IPS Display,up to 178° visible angle, auto-brightness screen, still visible under strong sunlight.
• Highly optimized internal construction with higher cooling efficiency.Higher speed and efficiency synchronous Digital Power Supply Technology.High speed ball-bearing fan promotes active cooling increase by 300%, even though the size has been reduced by 50%.
• The ISDT Q6 Pro have ARM 32bit high speed Processor, Outstanding performance from every perspective.
• After the depth of optimization SCOS,Instant Boot, only a few seconds.
• One key metal shuttle control replaces the multi-button press operation, makes charging with the Q6+ a delightful experience.
• Third Generation Smart Balance Charger,Increased accuracy, with slight charging voltage adjustment capability.
• The ISDT Q6 Pro comes in a variety of languages to suit your needs.
   

Note:

This charger do not with power cable, you need to prepare by yourself.
Batteries pose a SEVERE risk of fire if not properly handled.
Read Entire operation manual before using charger.
This unit may emit heat during use.
Only operate this device in a cool ventilated area away from flammable objects.
Failure to observe safety procedures may cause damages to property or injury.
 

Package included:

1x ISDT Q6 Pro BattGo Charger
1x Manual

Get it here: https://api.racer.lt/7tvt coupon for ISDT q6: ISDTQ6 

Don't forget about screen protector also! https://api.racer.lt/7u2v

ISDT PC-4860 1-8S Safe Parallel Board XT60 CNC Parallel Charging Board: https://api.racer.lt/7olf

ISDT FD-100 80W 6A Smart Control Discharger for 2S-8S Lipo Battery: https://api.racer.lt/7tai

Bonus - ISDT BattGo BG-8S Smart Battery Checker Balancer Receiver Signal Tester Quick Charge Function: https://api.racer.lt/7tvr

ISDT Q6 Lite 200W 8A MINI Pocket Battery Balance Charger for 2S-6S Lipo Battery: https://api.racer.lt/7u2w

ToolkitRC M8

This one is here as it's capable of doing similar things only priced more reasanable.

Has 2 fans

Is 8S capable, has USB charging and Servos tester

Feature:

• Charge, discharge and balance management support Lipo 8S, LiHV 8s,LiFe 8S, NiMh 20s ,Pb 12S battery
• Can measure PWM / PPM / SBUS / DBUS and other signal values, 
• Can measure battery voltage, battery internal resistance, ESC watt meter;
• Can output PWM / PPM / xBUS standard signal, constant current constant voltage source, and USB5.0V;
• Charger current: MAX 15A @300W
• Discharger current: reccycle mode 15A@300W Nomal:3A@20W
• Lixx Battery full voltage controllable (TVC function)
• Multi-language optional
• Udisk firmware upgrade(Slave device)

Specification:

• Input Voltage: DC 10-30V
• Output Voltage: 0-30V
• Charge Current: 0.1-15A
• Discharge Current: 0.1-15A(Recycling mode)
•                                0.1-3A(Internal consumption mode)
• Max Charge Capacity: 300W
• Max Discharge Capacity: 20W
• Supported Batt. Type:LiFe/Lilon/LiPo/LiHv (2-8S)
•                                 NiMH/Cd(1-20S)
•                                 Pb(1-10S)

Packaging Included:

1X iToolkit Charger 

Get your iToolkit M8 from here: https://api.racer.lt/7txn

From my personal experience all this chargers are great, it does not matter what you choose, if you need dual charger both will do great just look by the price you like.

Small travel chargers are also similar, all do same things, this list includes most of advanced chargers, others might be cheaper but not so reliable.