Choosing the right FPV radios & batteries component
An FPV battery, charger, charging hub, and receiver solve very different problems, so the right choice depends on the aircraft and the part your setup needs. This comparison covers a Sky Viper battery-and-charger set, two DJI FPV charging accessories, and a RadioMaster ExpressLRS receiver. Start by matching the product type and named compatibility before weighing price or extra features.
Quick take
- For a named Sky Viper drone: The 750mAh Battery & Charger Set is the most direct match because it names several Sky Viper models.
- For a DJI FPV AC power adapter: The CDX170-90 is the focused charger component, with a power cord included.
- For sequential multi-battery charging: The DJI FPV Charging Hub connects to a DJI FPV charger and handles three additional batteries in sequence.
- For an ExpressLRS radio build: The RadioMaster RP3 V2 is the receiver choice, with 2.4GHz ELRS operation and antenna diversity.
Listed-price comparison
The four listed prices run from $12.00 to $36.80, a $24.80 spread. The prices reflect different component types, so a lower figure does not make a receiver or battery set interchangeable with a DJI charging accessory.
| Product | Listed price | Price bar |
|---|---|---|
| Sky Viper 750mAh Battery & Charger Set | $12.00 | |
| DJI FPV AC Power Adapter CDX170-90 | $29.99 | |
| DJI FPV Battery Charging Hub | $36.80 | |
| RadioMaster RP3 V2 ELRS Receiver | $22.49 |
Decision matrix
- Replacing or adding power hardware for a Sky Viper s1700, s1750, V2400HD, V2450FPV, or V2450GPS: Choose the Sky Viper 750mAh set.
- Adding the AC power component to a DJI FPV charging setup: Choose the Genuine DJI FPV Drone Battery Charger AC Power Adapter CDX170-90.
- Expanding a DJI FPV charger for sequential multi-battery charging: Choose the Genuine DJI FPV Battery Charging Hub.
- Adding a receiver to an FPV build using ExpressLRS: Choose the RadioMaster RP3 V2 ExpressLRS 2.4GHz Receiver.
Product notes
Battery & Charger Set 750mAh for Sky Viper
The Battery & Charger Set 750mAh for Sky Viper is a direct match for the named s1700, s1750, V2400HD, V2450FPV, V2450GPS, FURY, SCOUT, and JOURNEY models. Its title identifies both a battery and charger, while the product description calls out a high-discharge, high-power battery. That combination makes it the practical pick when a Sky Viper setup needs both pieces together. The limitation is its specific fit language: the product centers on Sky Viper drones and those named models, not DJI FPV charging hardware or an ExpressLRS radio build. Choose it for that Sky Viper use case rather than for a standalone receiver or DJI accessory.
Genuine DJI FPV Drone Battery Charger AC Power Adapter CDX170-90
The Genuine DJI FPV Drone Battery Charger AC Power Adapter CDX170-90 25.2V 3.4A 86W is aimed at the AC power side of a DJI FPV charging setup. The model is identified as CDX170-90, and a power cord is included, giving this charger accessory a clear role when the adapter is the part needed. Its limitation is format: it is an AC power adapter, not a battery-and-charger bundle, a multi-battery hub, or an ExpressLRS receiver. The 25.2V, 3.4A, and 86W values describe the adapter as named; they do not make it a substitute for the other component types in this comparison.
Genuine DJI FPV Battery Charging Hub
The Genuine DJI FPV Battery Charging Hub is designed for expanding a DJI FPV charging arrangement. Connected to a DJI FPV charger, it can charge three additional batteries in sequence, and its title identifies it as a multiple-battery charger manager. That sequential charging role is the reason to choose it when a single DJI FPV charger needs a hub-based expansion. Its limitation is that it depends on a DJI FPV charger for that setup, and its condition is open box. It is therefore a charging accessory rather than a replacement battery, an AC adapter, or a radio receiver.
RadioMaster RP3 V2 ExpressLRS (ELRS) 2.4Ghz Receiver
The RadioMaster RP3 V2 ExpressLRS (ELRS) 2.4Ghz Receiver is the radio component in this group. It uses the 2.4GHz ExpressLRS format and includes antenna diversity, two antennas, a built-in TCXO, WiFi updates, and a listed DC 5V working voltage. Those attributes make it relevant to an FPV build that needs an ELRS receiver and the listed 5V supply. The limitation is category fit: it is a receiver, not a transmitter, battery, or charger. Its listed 500Hz/F1000Hz maximum receive refresh rate is a specification to match against the intended setup, not a reason to assume superiority over another radio component.
Final recommendation by use case
Choose the Sky Viper 750mAh Battery & Charger Set for the named Sky Viper drone models and a combined battery-and-charger purchase. Choose the DJI FPV AC Power Adapter CDX170-90 when the required part is the DJI FPV adapter with power cord. Choose the DJI FPV Battery Charging Hub when sequential charging of additional DJI FPV batteries is the goal, while accounting for its open-box condition. Choose the RadioMaster RP3 V2 when the missing part is a 2.4GHz ExpressLRS receiver operating at DC 5V.
